Add Hugo Docsite - #1974

An SVG with CSS animation, which GitHub plays inline: 250 agents,
the atenet router, 8 warm worker pods. Copy follows the docsite
hero (agent-substrate#1974) and the greens come from the logo. The latency figure
is left out until the number is settled. prefers-reduced-motion
shows the static frame.

Signed-off-by: Haven Xia <[email protected]>

An SVG with CSS animation, which GitHub plays inline: 250 agents,
the atenet router, 8 warm worker pods. Copy follows the docsite
hero (agent-substrate#1974) and the greens come from the logo. The latency figure
is left out until the number is settled. prefers-reduced-motion
shows the static frame.

Signed-off-by: Haven Xia <[email protected]>

An SVG with CSS animation, which GitHub plays inline: 250 agents,
the atenet router, 8 warm worker pods with several sandboxes each.
Copy follows the docsite hero (agent-substrate#1974) and the greens come from the
logo. The latency figure is left out until the number is settled.
prefers-reduced-motion shows the static frame.

Signed-off-by: Haven Xia <[email protected]>

An SVG with CSS animation, which GitHub plays inline: 250 agents,
the atenet router, 8 warm worker pods with several sandboxes each.
Copy follows the docsite hero (agent-substrate#1974) and the greens come from the
logo. The latency figure is left out until the number is settled.
prefers-reduced-motion shows the static frame.

The badge row adds release, CI, govulncheck, stars and Trendshift.
Go Report Card is retired, so it is left out.

Signed-off-by: Haven Xia <[email protected]>

An SVG with CSS animation, which GitHub plays inline: 250 agents,
the atenet router, 8 warm worker pods with several sandboxes each.
Copy follows the docsite hero (agent-substrate#1974) and the greens come from the
logo. The latency figure is left out until the number is settled.
prefers-reduced-motion shows the static frame.

The badge row adds release, CI, govulncheck, stars and Trendshift.
Go Report Card is retired, so it is left out.

Signed-off-by: Haven Xia <[email protected]>

Supersedes agent-substrate#3396 by @stshrive, rebased onto current `main`. The commit
keeps his authorship and sign-off.

The GKE provisioning and teardown tooling now lives in
https://github.com/ai-on-gke/substrate-gke under tools/setup-gcp, so
core no longer carries a copy. Docs and comments that pointed at the
removed files now point at substrate-gke. go mod tidy drops the GCP
client modules only setup-gcp used, and vendor/ and _LICENSES/ are
regenerated to match.

Covers agent-substrate#3390, except that hack/teardown.sh is removed here as well;
substrate-gke's tools/setup-gcp/teardown.sh replaces it.

Part of agent-substrate#2304

### Rebase notes
Conflicts were mostly from the Hugo docsite move (agent-substrate#1974):
- `tools/setup-gcp/cloud-sql.md`: deleted, as in the original PR.
- `docs/guides/operator-install.md`, `docs/guides/postgres.md`: the
original edits, re-applied at the new paths.
- `docs/guides/observability.md`: kept main's version, since agent-substrate#1974
already removed the Dashboards section the original PR edited.
- `cmd/kubectl-ate/README.md`: kept main's stub that points to
`docs/reference/kubectl-ate.md`. That page no longer has the setup-gcp
line, so the edit had nowhere to go.

---------

Signed-off-by: Steven Shriver <[email protected]>
Signed-off-by: Grant McCloskey <[email protected]>
Co-authored-by: Steven Shriver <[email protected]>

Supersedes agent-substrate#3396 by @stshrive, rebased onto current `main`. The commit
keeps his authorship and sign-off.

The GKE provisioning and teardown tooling now lives in
https://github.com/ai-on-gke/substrate-gke under tools/setup-gcp, so
core no longer carries a copy. Docs and comments that pointed at the
removed files now point at substrate-gke. go mod tidy drops the GCP
client modules only setup-gcp used, and vendor/ and _LICENSES/ are
regenerated to match.

Covers agent-substrate#3390, except that hack/teardown.sh is removed here as well;
substrate-gke's tools/setup-gcp/teardown.sh replaces it.

Part of agent-substrate#2304

### Rebase notes
Conflicts were mostly from the Hugo docsite move (agent-substrate#1974):
- `tools/setup-gcp/cloud-sql.md`: deleted, as in the original PR.
- `docs/guides/operator-install.md`, `docs/guides/postgres.md`: the
original edits, re-applied at the new paths.
- `docs/guides/observability.md`: kept main's version, since agent-substrate#1974
already removed the Dashboards section the original PR edited.
- `cmd/kubectl-ate/README.md`: kept main's stub that points to
`docs/reference/kubectl-ate.md`. That page no longer has the setup-gcp
line, so the edit had nowhere to go.

---------

Signed-off-by: Steven Shriver <[email protected]>
Signed-off-by: Grant McCloskey <[email protected]>
Co-authored-by: Steven Shriver <[email protected]>
(cherry picked from commit b66e16a)

Supersedes #3396 by @stshrive, rebased onto current `main`. The commit
keeps his authorship and sign-off.

The GKE provisioning and teardown tooling now lives in
https://github.com/ai-on-gke/substrate-gke under tools/setup-gcp, so
core no longer carries a copy. Docs and comments that pointed at the
removed files now point at substrate-gke. go mod tidy drops the GCP
client modules only setup-gcp used, and vendor/ and _LICENSES/ are
regenerated to match.

Covers #3390, except that hack/teardown.sh is removed here as well;
substrate-gke's tools/setup-gcp/teardown.sh replaces it.

Part of #2304

### Rebase notes
Conflicts were mostly from the Hugo docsite move (#1974):
- `tools/setup-gcp/cloud-sql.md`: deleted, as in the original PR.
- `docs/guides/operator-install.md`, `docs/guides/postgres.md`: the
original edits, re-applied at the new paths.
- `docs/guides/observability.md`: kept main's version, since #1974
already removed the Dashboards section the original PR edited.
- `cmd/kubectl-ate/README.md`: kept main's stub that points to
`docs/reference/kubectl-ate.md`. That page no longer has the setup-gcp
line, so the edit had nowhere to go.

---------

Signed-off-by: Steven Shriver <[email protected]>
Signed-off-by: Grant McCloskey <[email protected]>
Co-authored-by: Steven Shriver <[email protected]>
(cherry picked from commit b66e16a)
Signed-off-by: Eitan Yarmush <[email protected]>