Initial commit: Plex MCP server with 6 tools and API passthrough

- get_libraries: List all library sections
- search_library: Search for media by title
- get_metadata: Get detailed item info by rating key
- get_recently_added: Get recently added content
- refresh_library: Trigger library scan
- plex_api_call: Raw API passthrough for any endpoint
- search_api_docs: Search OpenAPI spec for endpoint documentation

Includes Docker support and Gitea Actions workflow for container builds.

.gitignore

@@ -0,0 +1,45 @@
+# Python
+__pycache__/
+*.py[cod]
+*$py.class
+*.so
+.Python
+build/
+develop-eggs/
+dist/
+downloads/
+eggs/
+.eggs/
+lib/
+lib64/
+parts/
+sdist/
+var/
+wheels/
+*.egg-info/
+.installed.cfg
+*.egg
+
+# Virtual environments
+.venv/
+venv/
+ENV/
+
+# IDE
+.idea/
+.vscode/
+*.swp
+*.swo
+
+# Environment
+.env
+.env.local
+
+# Cache
+.ruff_cache/
+.mypy_cache/
+.pytest_cache/
+
+# OS
+.DS_Store
+Thumbs.db