docs(A1.9): Add comprehensive git source documentation and example repository

Phase 4 Complete:
- Updated README.md with git source usage examples and use cases
- Created docs/GIT_CONFIG_SOURCES.md (800+ lines comprehensive guide)
- Updated CHANGELOG.md with v2.2.0 release notes
- Added configs/example-team/ example repository with E2E test

Documentation covers:
- Quick start and architecture
- MCP tools reference (4 tools with examples)
- Authentication for GitHub, GitLab, Bitbucket
- Use cases (small teams, enterprise, open source)
- Best practices, troubleshooting, advanced topics
- Complete API reference

Example repository includes:
- 3 example configs (react-custom, vue-internal, company-api)
- README with usage guide
- E2E test script (7 steps, 100% passing)

🤖 Generated with Claude Code
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

configs/example-team/test_e2e.py

@@ -0,0 +1,131 @@
+#!/usr/bin/env python3
+"""
+E2E Test Script for Example Team Config Repository
+
+Tests the complete workflow:
+1. Register the example-team source
+2. Fetch a config from it
+3. Verify the config was loaded correctly
+4. Clean up
+"""
+
+import os
+import sys
+from pathlib import Path
+
+# Add parent directory to path
+sys.path.insert(0, str(Path(__file__).parent.parent.parent))
+
+from skill_seekers.mcp.source_manager import SourceManager
+from skill_seekers.mcp.git_repo import GitConfigRepo
+
+
+def test_example_team_repo():
+    """Test the example-team repository end-to-end."""
+    print("🧪 E2E Test: Example Team Config Repository\n")
+
+    # Get absolute path to example-team directory
+    example_team_path = Path(__file__).parent.absolute()
+    git_url = f"file://{example_team_path}"
+
+    print(f"📁 Repository: {git_url}\n")
+
+    # Step 1: Add source
+    print("1️⃣  Registering source...")
+    sm = SourceManager()
+    try:
+        source = sm.add_source(
+            name="example-team-test",
+            git_url=git_url,
+            source_type="custom",
+            branch="master"  # Git init creates 'master' by default
+        )
+        print(f"   ✅ Source registered: {source['name']}")
+    except Exception as e:
+        print(f"   ❌ Failed to register source: {e}")
+        return False
+
+    # Step 2: Clone/pull repository
+    print("\n2️⃣  Cloning repository...")
+    gr = GitConfigRepo()
+    try:
+        repo_path = gr.clone_or_pull(
+            source_name="example-team-test",
+            git_url=git_url,
+            branch="master"
+        )
+        print(f"   ✅ Repository cloned to: {repo_path}")
+    except Exception as e:
+        print(f"   ❌ Failed to clone repository: {e}")
+        return False
+
+    # Step 3: List available configs
+    print("\n3️⃣  Discovering configs...")
+    try:
+        configs = gr.find_configs(repo_path)
+        print(f"   ✅ Found {len(configs)} configs:")
+        for config_file in configs:
+            print(f"      - {config_file.name}")
+    except Exception as e:
+        print(f"   ❌ Failed to discover configs: {e}")
+        return False
+
+    # Step 4: Fetch a specific config
+    print("\n4️⃣  Fetching 'react-custom' config...")
+    try:
+        config = gr.get_config(repo_path, "react-custom")
+        print(f"   ✅ Config loaded successfully!")
+        print(f"      Name: {config['name']}")
+        print(f"      Description: {config['description']}")
+        print(f"      Base URL: {config['base_url']}")
+        print(f"      Max Pages: {config['max_pages']}")
+        if 'metadata' in config:
+            print(f"      Team: {config['metadata'].get('team', 'N/A')}")
+    except Exception as e:
+        print(f"   ❌ Failed to fetch config: {e}")
+        return False
+
+    # Step 5: Verify config content
+    print("\n5️⃣  Verifying config content...")
+    try:
+        assert config['name'] == 'react-custom', "Config name mismatch"
+        assert 'selectors' in config, "Missing selectors"
+        assert 'url_patterns' in config, "Missing url_patterns"
+        assert 'categories' in config, "Missing categories"
+        print("   ✅ Config structure validated")
+    except AssertionError as e:
+        print(f"   ❌ Validation failed: {e}")
+        return False
+
+    # Step 6: List all sources
+    print("\n6️⃣  Listing all sources...")
+    try:
+        sources = sm.list_sources()
+        print(f"   ✅ Total sources: {len(sources)}")
+        for src in sources:
+            print(f"      - {src['name']} ({src['type']})")
+    except Exception as e:
+        print(f"   ❌ Failed to list sources: {e}")
+        return False
+
+    # Step 7: Clean up
+    print("\n7️⃣  Cleaning up...")
+    try:
+        removed = sm.remove_source("example-team-test")
+        if removed:
+            print("   ✅ Source removed successfully")
+        else:
+            print("   ⚠️  Source was not found (already removed?)")
+    except Exception as e:
+        print(f"   ❌ Failed to remove source: {e}")
+        return False
+
+    print("\n" + "="*60)
+    print("✅ E2E TEST PASSED - All steps completed successfully!")
+    print("="*60)
+    return True
+
+
+if __name__ == "__main__":
+    success = test_example_team_repo()
+    sys.exit(0 if success else 1)