Summary

Document actual Preview2 coverage per runtime and update package docs so users can see which Preview2 packages and worlds work on native, web, and node.

Parent tracking issue: #55
Suggested implementation order: 14 / 14

Suggested dependencies

• Add Preview 2 conformance fixtures and selected official suite coverage #68 Add Preview 2 conformance fixtures and selected official suite coverage

References

• https://github.com/WebAssembly/WASI/blob/main/docs/Preview2.md
• https://github.com/WebAssembly/wasi-cli/tree/v0.2.8
• https://github.com/WebAssembly/wasi-http/tree/v0.2.8

Acceptance criteria

• README and compatibility docs describe Preview2 support by runtime rather than a single package-level claim.
• The docs call out that node support is implemented via JS interop host adapters rather than node:wasi.
• Intentional exclusions and incomplete packages are documented explicitly.