feat: Add Official Microsoft & Gemini Skills (845+ Total)

🚀 Impact

Significantly expands the capabilities of **Antigravity Awesome Skills** by integrating official skill collections from **Microsoft** and **Google Gemini**. This update increases the total skill count to **845+**, making the library even more comprehensive for AI coding assistants.

✨ Key Changes

1. New Official Skills

- **Microsoft Skills**: Added a massive collection of official skills from [microsoft/skills](https://github.com/microsoft/skills).
  - Includes Azure, .NET, Python, TypeScript, and Semantic Kernel skills.
  - Preserves the original directory structure under `skills/official/microsoft/`.
  - Includes plugin skills from the `.github/plugins` directory.
- **Gemini Skills**: Added official Gemini API development skills under `skills/gemini-api-dev/`.

2. New Scripts & Tooling

- **`scripts/sync_microsoft_skills.py`**: A robust synchronization script that:
  - Clones the official Microsoft repository.
  - Preserves the original directory heirarchy.
  - Handles symlinks and plugin locations.
  - Generates attribution metadata.
- **`scripts/tests/inspect_microsoft_repo.py`**: Debug tool to inspect the remote repository structure.
- **`scripts/tests/test_comprehensive_coverage.py`**: Verification script to ensure 100% of skills are captured during sync.

3. Core Improvements

- **`scripts/generate_index.py`**: Enhanced frontmatter parsing to safely handle unquoted values containing `@` symbols and commas (fixing issues with some Microsoft skill descriptions).
- **`package.json`**: Added `sync:microsoft` and `sync:all-official` scripts for easy maintenance.

4. Documentation

- Updated `README.md` to reflect the new skill counts (845+) and added Microsoft/Gemini to the provider list.
- Updated `CATALOG.md` and `skills_index.json` with the new skills.

🧪 Verification

- Ran `scripts/tests/test_comprehensive_coverage.py` to verify all Microsoft skills are detected.
- Validated `generate_index.py` fixes by successfully indexing the new skills.

scripts/generate_index.py

@@ -6,14 +6,34 @@ import yaml
 
 def parse_frontmatter(content):
     """
-    Parses YAML frontmatter using PyYAML for standard compliance.
+    Parses YAML frontmatter, sanitizing unquoted values containing @.
+    Handles single values and comma-separated lists by quoting the entire line.
     """
     fm_match = re.search(r'^---\s*\n(.*?)\n---', content, re.DOTALL)
     if not fm_match:
         return {}
     
+    yaml_text = fm_match.group(1)
+    
+    # Process line by line to handle values containing @ and commas
+    sanitized_lines = []
+    for line in yaml_text.splitlines():
+        # Match "key: value" (handles keys with dashes like 'package-name')
+        match = re.match(r'^(\s*[\w-]+):\s*(.*)$', line)
+        if match:
+            key, val = match.groups()
+            val_s = val.strip()
+            # If value contains @ and isn't already quoted, wrap the whole string in double quotes
+            if '@' in val_s and not (val_s.startswith('"') or val_s.startswith("'")):
+                # Escape any existing double quotes within the value string
+                safe_val = val_s.replace('"', '\\"')
+                line = f'{key}: "{safe_val}"'
+        sanitized_lines.append(line)
+    
+    sanitized_yaml = '\n'.join(sanitized_lines)
+    
     try:
-        return yaml.safe_load(fm_match.group(1)) or {}
+        return yaml.safe_load(sanitized_yaml) or {}
     except yaml.YAMLError as e:
         print(f"⚠️ YAML parsing error: {e}")
         return {}