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/kyberforge/.github/plugin/plugin.json

@@ -7,5 +7,14 @@
     "email": "defame1297@rkdr.net",
     "url": "https://git.dev.rkdr.net/Defame1297/"
   },
-  "license": "MIT"
+  "license": "MIT",
+  "homepage": "https://git.dev.rkdr.net/Defame1297/holocron/src/branch/main/plugins/kyberforge",
+  "repository": "https://git.dev.rkdr.net/Defame1297/holocron/src/branch/main/plugins/kyberforge",
+  "keywords": [
+    "marketplace",
+    "plugin",
+    "skill-authoring",
+    "agent-authoring",
+    "apm"
+  ]
 }