Reorganize: Move all skills to skills/ folder

- Created skills/ directory
- Moved 272 skills to skills/ subfolder
- Kept agents/ at root level
- Kept installation scripts and docs at root level

Repository structure:
- skills/           - All 272 skills from skills.sh
- agents/           - Agent definitions
- *.sh, *.ps1       - Installation scripts
- README.md, etc.   - Documentation

Co-Authored-By: Claude <noreply@anthropic.com>

skills/plugins/known_marketplaces.json

@@ -0,0 +1,26 @@
+{
+    "claude-plugins-official": {
+        "source": {
+            "source": "github",
+            "repo": "anthropics\/claude-plugins-official"
+        },
+        "installLocation": "\/home\/uroma\/.claude\/plugins\/marketplaces\/claude-plugins-official",
+        "lastUpdated": "2026-01-13T18:41:30.927Z"
+    },
+    "zai-coding-plugins": {
+        "source": {
+            "source": "directory",
+            "path": "\/home\/uroma\/.npm\/_npx\/2f024689b4d0d3b0\/node_modules\/@z_ai\/coding-helper\/zai-coding-plugins"
+        },
+        "installLocation": "\/home\/uroma\/.npm\/_npx\/2f024689b4d0d3b0\/node_modules\/@z_ai\/coding-helper\/zai-coding-plugins",
+        "lastUpdated": "2026-01-13T18:41:34.951Z"
+    },
+    "design-plugins": {
+        "source": {
+            "source": "directory",
+            "path": "\/home\/uroma\/.claude\/plugins\/marketplaces\/design-plugins"
+        },
+        "installLocation": "\/home\/uroma\/.claude\/plugins\/marketplaces\/design-plugins",
+        "lastUpdated": "2026-01-18T15:55:04+00:00"
+    }
+}