docs(kyberforge): add keywords/homepage/repository to plugin apm.yml

bin and kyberforge had empty keywords: [], and no plugin set homepage or
repository despite the schema supporting both and the repo having one
canonical Gitea remote -- flagged by an apm-docs-vs-repo audit following
issue #90's plugin->apm conversion.

Compiled .claude-plugin/plugin.json and .github/plugin/plugin.json were
regenerated via scripts/sync-plugin-content.sh to carry the new fields.

Refs: #90

plugins/git/.claude-plugin/plugin.json

@@ -8,6 +8,8 @@
     "url": "https://git.dev.rkdr.net/Defame1297/"
   },
   "license": "MIT",
+  "homepage": "https://git.dev.rkdr.net/Defame1297/holocron/src/branch/main/plugins/git",
+  "repository": "https://git.dev.rkdr.net/Defame1297/holocron/src/branch/main/plugins/git",
   "keywords": [
     "git",
     "vcs",