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

docs/users/visual-guide.md

@@ -34,7 +34,7 @@ antigravity-awesome-skills/
 ├── 📄 CONTRIBUTING.md                  ← Contributor workflow
 ├── 📄 CATALOG.md                       ← Full generated catalog
 │
-├── 📁 skills/                          ← 1,332+ skills live here
+├── 📁 skills/                          ← 1,340+ skills live here
 │   │
 │   ├── 📁 brainstorming/
 │   │   └── 📄 SKILL.md                 ← Skill definition
@@ -47,7 +47,7 @@ antigravity-awesome-skills/
 │   │   └── 📁 2d-games/
 │   │       └── 📄 SKILL.md             ← Nested skills also supported
 │   │
-│   └── ... (1,332+ total)
+│   └── ... (1,340+ total)
 │
 ├── 📁 apps/
 │   └── 📁 web-app/                     ← Interactive browser
@@ -100,7 +100,7 @@ antigravity-awesome-skills/
 
 ```
                     ┌─────────────────────────┐
-                    │  1,332+ SKILLS          │
+                    │  1,340+ SKILLS          │
                     └────────────┬────────────┘
                                  │
         ┌────────────────────────┼────────────────────────┐
@@ -201,7 +201,7 @@ If you want a workspace-style manual install instead, cloning into `.agent/skill
 │   ├── 📁 brainstorming/                 │
 │   ├── 📁 stripe-integration/            │
 │   ├── 📁 react-best-practices/          │
-│   └── ... (1,332+ total)                │
+│   └── ... (1,340+ total)                │
 └─────────────────────────────────────────┘
 ```