chore(gitea): regenerate the flat content mirror after the ADR-0020 retrofit

Generated output, not authored content: scripts/sync-plugin-content.sh --all.
Claude Code has no .apm/ awareness, so this compiled mirror must track .apm/ or
the check-plugin-content-sync pre-push hook reports drift.

Deferred to a single commit at the end of the wave on purpose. sync_dir runs
rm -rf before every copy, so running it while seven agents were editing the
same plugin would have raced them; agents were told not to sync for that reason.

Refs #99

plugins/gitea/skills/gitea-workflow/references/skill-index.md

@@ -0,0 +1,22 @@
+---
+topic: skill-index
+source_keys:
+  - gitea-mcp-repo
+---
+
+# Domain-skill index
+
+The request names a capability but not obviously which skill owns it. Find the owner here, then invoke it:
+
+| Skill | Covers |
+|---|---|
+| `gitea-issues` | List/read/create/update issues, comments, search across issues and PRs. Composes `gitea-labels-milestones` for label/milestone resolution. |
+| `gitea-labels-milestones` | Label and milestone CRUD, label inference from conversation context, resolving names/titles to the numeric IDs writes require. Cross-cutting — used by both `gitea-issues` and `gitea-prs`. |
+| `gitea-prs` | List/read/create/update/merge PRs, code reviews. Composes `gitea-labels-milestones` the same way `gitea-issues` does. |
+| `gitea-branches` | Branch list/create/delete, plus commit history (list commits, get a single commit by SHA). |
+| `gitea-files` | Read/write/delete individual files, list a directory, walk the full repo tree. |
+| `gitea-releases` | Release and tag CRUD — draft/prerelease flags, release notes, semver tags. |
+
+A request that already names its own owner (e.g. "create a milestone" → `gitea-labels-milestones`, "read this file from the repo" → `gitea-files`) never needed this index — invoke that skill directly rather than routing through here.
+
+Then report per `SKILL.md`'s Report section: name the skill and hand off — don't duplicate its output format, let it report.