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.

Dockerfile

@@ -0,0 +1,24 @@
+FROM python:3.11-slim
+
+WORKDIR /app
+
+# Install dependencies
+COPY pyproject.toml ./
+RUN pip install --no-cache-dir .
+
+# Copy application code
+COPY server.py ./
+COPY openapi.json ./
+COPY docs/ ./docs/
+
+# Create non-root user
+RUN useradd --create-home --shell /bin/bash appuser && \
+    chown -R appuser:appuser /app
+USER appuser
+
+EXPOSE 8000
+
+HEALTHCHECK --interval=30s --timeout=10s --start-period=5s --retries=3 \
+    CMD python -c "import httpx; httpx.get('http://localhost:8000/health').raise_for_status()"
+
+CMD ["python", "server.py"]