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/company-api.json

@@ -0,0 +1,42 @@
+{
+  "name": "company-api",
+  "description": "Internal company API documentation (example)",
+  "base_url": "https://docs.example.com/api/",
+  "selectors": {
+    "main_content": "div.documentation",
+    "title": "h1.page-title",
+    "code_blocks": "pre.highlight"
+  },
+  "url_patterns": {
+    "include": [
+      "/api/v2"
+    ],
+    "exclude": [
+      "/api/v1",
+      "/changelog",
+      "/deprecated"
+    ]
+  },
+  "categories": {
+    "authentication": ["api/v2/auth", "api/v2/oauth"],
+    "users": ["api/v2/users"],
+    "payments": ["api/v2/payments", "api/v2/billing"],
+    "webhooks": ["api/v2/webhooks"],
+    "rate_limits": ["api/v2/rate-limits"]
+  },
+  "rate_limit": 1.0,
+  "max_pages": 100,
+  "metadata": {
+    "team": "platform",
+    "api_version": "v2",
+    "last_updated": "2025-12-21",
+    "maintainer": "platform-team@example.com",
+    "internal": true,
+    "notes": "Only includes v2 API - v1 is deprecated. Requires VPN access to docs.example.com",
+    "example_urls": [
+      "https://docs.example.com/api/v2/auth/oauth",
+      "https://docs.example.com/api/v2/users/create",
+      "https://docs.example.com/api/v2/payments/charge"
+    ]
+  }
+}