chore(plugins): sync generated content mirrors

Regenerates `plugins/*/skills`, `plugins/*/agents`, both per-plugin `plugin.json` manifests and the
two marketplace mirrors from `.apm/` per ADR-0017, via `scripts/sync-plugin-content.sh --all`.

The manifests matter beyond tidiness here: `plugin.json` carries the plugin version and wins over
the marketplace entry at install time (calculatePluginVersion precedence). Until this ran, the patch
bumps in the preceding commit were inert for anyone installing these plugins.

ADR: 0017
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01EeH8SCbcrCAQrtymkNuhKP

plugins/gitea/.claude-plugin/plugin.json

@@ -1,6 +1,6 @@
 {
   "name": "gitea",
-  "version": "1.3.7",
+  "version": "1.3.8",
   "description": "Skills and agents for working with a Gitea forge through its HTTP API \u2014 the forge's own objects, as distinct from the local git clone.",
   "author": {
     "name": "Defame1297",