feat(hugging-face): Add official ecosystem skills

Import the official Hugging Face ecosystem skills and sync the\nexisting local coverage with upstream metadata and assets.\n\nRegenerate the canonical catalog, plugin mirrors, docs, and release\nnotes after the maintainer merge batch so main stays in sync.\n\nFixes #417

package.json

@@ -1,7 +1,7 @@
 {
   "name": "antigravity-awesome-skills",
   "version": "9.1.0",
-  "description": "1,332+ agentic skills for Claude Code, Gemini CLI, Cursor, Antigravity & more. Installer CLI.",
+  "description": "1,340+ agentic skills for Claude Code, Gemini CLI, Cursor, Antigravity & more. Installer CLI.",
   "license": "MIT",
   "scripts": {
     "validate": "node tools/scripts/run-python.js tools/scripts/validate_skills.py",