Primarily adds the Generating Bindings section, but also updates the PDK
and SDK list to include more languages.

…ithub/workflows (#792)

Bumps
[dawidd6/action-download-artifact](https://github.com/dawidd6/action-download-artifact)
from 2 to 6.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/dawidd6/action-download-artifact/releases">dawidd6/action-download-artifact's
releases</a>.</em></p>
<blockquote>
<h2>v6</h2>
<p><strong>Full Changelog</strong>: <a
href="https://github.com/dawidd6/action-download-artifact/compare/v5...v6">https://github.com/dawidd6/action-download-artifact/compare/v5...v6</a></p>
<h2>v5</h2>
<p><strong>Full Changelog</strong>: <a
href="https://github.com/dawidd6/action-download-artifact/compare/v4...v5">https://github.com/dawidd6/action-download-artifact/compare/v4...v5</a></p>
<h2>v4</h2>
<h2>What's Changed</h2>
<ul>
<li><strong>VERSIONING CHANGE</strong>: now there will only be major
releases of this action, e.g. v5, v6 and so on</li>
<li>build(deps): bump undici from 5.28.3 to 5.28.4 by <a
href="https://github.com/dependabot"><code>@​dependabot</code></a> in <a
href="https://redirect.github.com/dawidd6/action-download-artifact/pull/284">dawidd6/action-download-artifact#284</a></li>
<li>build(deps): bump <code>@​actions/artifact</code> from 2.1.4 to
2.1.5 by <a
href="https://github.com/dependabot"><code>@​dependabot</code></a> in <a
href="https://redirect.github.com/dawidd6/action-download-artifact/pull/285">dawidd6/action-download-artifact#285</a></li>
<li>build(deps): bump <code>@​actions/artifact</code> from 2.1.5 to
2.1.7 by <a
href="https://github.com/dependabot"><code>@​dependabot</code></a> in <a
href="https://redirect.github.com/dawidd6/action-download-artifact/pull/287">dawidd6/action-download-artifact#287</a></li>
<li>build(deps): bump adm-zip from 0.5.12 to 0.5.13 by <a
href="https://github.com/dependabot"><code>@​dependabot</code></a> in <a
href="https://redirect.github.com/dawidd6/action-download-artifact/pull/289">dawidd6/action-download-artifact#289</a></li>
<li>Set allow_forks to false by default by <a
href="https://github.com/timweri"><code>@​timweri</code></a> in <a
href="https://redirect.github.com/dawidd6/action-download-artifact/pull/290">dawidd6/action-download-artifact#290</a></li>
</ul>
<h2>New Contributors</h2>
<ul>
<li><a href="https://github.com/timweri"><code>@​timweri</code></a> made
their first contribution in <a
href="https://redirect.github.com/dawidd6/action-download-artifact/pull/290">dawidd6/action-download-artifact#290</a></li>
</ul>
<p><strong>Full Changelog</strong>: <a
href="https://github.com/dawidd6/action-download-artifact/compare/v3...v4">https://github.com/dawidd6/action-download-artifact/compare/v3...v4</a></p>
<h2>v3.1.4</h2>
<h2>What's Changed</h2>
<ul>
<li>build(deps): bump adm-zip from 0.5.10 to 0.5.12 by <a
href="https://github.com/dependabot"><code>@​dependabot</code></a> in <a
href="https://redirect.github.com/dawidd6/action-download-artifact/pull/282">dawidd6/action-download-artifact#282</a></li>
<li>build(deps): bump <code>@​actions/artifact</code> from 2.1.2 to
2.1.4 by <a
href="https://github.com/dependabot"><code>@​dependabot</code></a> in <a
href="https://redirect.github.com/dawidd6/action-download-artifact/pull/280">dawidd6/action-download-artifact#280</a></li>
<li>fix: accept expired artifacts with documentation url by <a
href="https://github.com/wdconinc"><code>@​wdconinc</code></a> in <a
href="https://redirect.github.com/dawidd6/action-download-artifact/pull/283">dawidd6/action-download-artifact#283</a></li>
</ul>
<h2>New Contributors</h2>
<ul>
<li><a href="https://github.com/wdconinc"><code>@​wdconinc</code></a>
made their first contribution in <a
href="https://redirect.github.com/dawidd6/action-download-artifact/pull/283">dawidd6/action-download-artifact#283</a></li>
</ul>
<p><strong>Full Changelog</strong>: <a
href="https://github.com/dawidd6/action-download-artifact/compare/v3...v3.1.4">https://github.com/dawidd6/action-download-artifact/compare/v3...v3.1.4</a></p>
<h2>v3.1.3</h2>
<h2>What's Changed</h2>
<ul>
<li>node_modules: upgrade by <a
href="https://github.com/dawidd6"><code>@​dawidd6</code></a> in <a
href="https://redirect.github.com/dawidd6/action-download-artifact/pull/276">dawidd6/action-download-artifact#276</a></li>
<li>build(deps): bump <code>@​actions/artifact</code> from 2.1.1 to
2.1.2 by <a
href="https://github.com/dependabot"><code>@​dependabot</code></a> in <a
href="https://redirect.github.com/dawidd6/action-download-artifact/pull/277">dawidd6/action-download-artifact#277</a></li>
</ul>
<p><strong>Full Changelog</strong>: <a
href="https://github.com/dawidd6/action-download-artifact/compare/v3.1.2...v3.1.3">https://github.com/dawidd6/action-download-artifact/compare/v3.1.2...v3.1.3</a></p>
<h2>v3.1.2</h2>
<h2>What's Changed</h2>
<ul>
<li>Read workflow_search input as a boolean by <a
href="https://github.com/klutchell"><code>@​klutchell</code></a> in <a
href="https://redirect.github.com/dawidd6/action-download-artifact/pull/273">dawidd6/action-download-artifact#273</a></li>
</ul>
<h2>New Contributors</h2>
<ul>
<li><a href="https://github.com/klutchell"><code>@​klutchell</code></a>
made their first contribution in <a
href="https://redirect.github.com/dawidd6/action-download-artifact/pull/273">dawidd6/action-download-artifact#273</a></li>
</ul>
<p><strong>Full Changelog</strong>: <a
href="https://github.com/dawidd6/action-download-artifact/compare/v3.1.1...v3.1.2">https://github.com/dawidd6/action-download-artifact/compare/v3.1.1...v3.1.2</a></p>
<h2>v3.1.1</h2>
<h2>What's Changed</h2>
<!-- raw HTML omitted -->
</blockquote>
<p>... (truncated)</p>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/dawidd6/action-download-artifact/commit/bf251b5aa9c2f7eeb574a96ee720e24f801b7c11"><code>bf251b5</code></a>
node_modules: upgrade</li>
<li><a
href="https://github.com/dawidd6/action-download-artifact/commit/93c629661111aae296c04004b30ae3ba22ed46f3"><code>93c6296</code></a>
README: v5</li>
<li><a
href="https://github.com/dawidd6/action-download-artifact/commit/deb3bb83256a78589fef6a7b942e5f2573ad7c13"><code>deb3bb8</code></a>
node_modules: upgrade</li>
<li><a
href="https://github.com/dawidd6/action-download-artifact/commit/1d93f37db2a8005b41437c75a4793d52e664d858"><code>1d93f37</code></a>
README: v4</li>
<li><a
href="https://github.com/dawidd6/action-download-artifact/commit/854e2de9396304899dbe03bf9995fd73533190d1"><code>854e2de</code></a>
Set allow_forks to false by default (<a
href="https://redirect.github.com/dawidd6/action-download-artifact/issues/290">#290</a>)</li>
<li><a
href="https://github.com/dawidd6/action-download-artifact/commit/436c9d3774019b3e2789d7332e9c4efdba3d9d79"><code>436c9d3</code></a>
build(deps): bump adm-zip from 0.5.12 to 0.5.13 (<a
href="https://redirect.github.com/dawidd6/action-download-artifact/issues/289">#289</a>)</li>
<li><a
href="https://github.com/dawidd6/action-download-artifact/commit/14040524bb7e51dee9683e2e755e0d562621a1d5"><code>1404052</code></a>
build(deps): bump <code>@​actions/artifact</code> from 2.1.5 to 2.1.7
(<a
href="https://redirect.github.com/dawidd6/action-download-artifact/issues/287">#287</a>)</li>
<li><a
href="https://github.com/dawidd6/action-download-artifact/commit/8a9be734dc508dcf8d67c27ba3f727b0d682ccb0"><code>8a9be73</code></a>
build(deps): bump <code>@​actions/artifact</code> from 2.1.4 to 2.1.5
(<a
href="https://redirect.github.com/dawidd6/action-download-artifact/issues/285">#285</a>)</li>
<li><a
href="https://github.com/dawidd6/action-download-artifact/commit/df593bbd0462b45b479f042d043c3aa47fe1c483"><code>df593bb</code></a>
build(deps): bump undici from 5.28.3 to 5.28.4 (<a
href="https://redirect.github.com/dawidd6/action-download-artifact/issues/284">#284</a>)</li>
<li><a
href="https://github.com/dawidd6/action-download-artifact/commit/09f2f74827fd3a8607589e5ad7f9398816f540fe"><code>09f2f74</code></a>
fix: accept expired artifacts with documentation url (<a
href="https://redirect.github.com/dawidd6/action-download-artifact/issues/283">#283</a>)</li>
<li>Additional commits viewable in <a
href="https://github.com/dawidd6/action-download-artifact/compare/v2...v6">compare
view</a></li>
</ul>
</details>
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`extism_compiled_plugin_new` would panic on bad manifest input (there's
a test in the python sdk [1] that hits this directly.) Catch the error and
set `errmsg` appropriately instead.

Additionally: golf the function pointer casting for the various `plugin_new` calls,
with the goal of reducing the number of allocations by leaning on iterator size
hints (and reducing the scope of `unsafe{}` use.) This part can be severed: it
introduces a breaking change. Previously `NULL` values were silently accepted in
the `functions**` list; now they fail. This maintains consistency with behavior on
"consumed" `ExtismFunction` pointer.

[1]: https://github.com/extism/python-sdk/blob/main/tests/test_extism.py#L50-L53