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.

.env.example

@@ -0,0 +1,14 @@
+# Plex MCP Server Configuration
+
+# Plex Media Server URL (include port, typically 32400)
+PLEX_URL=http://localhost:32400
+
+# Plex authentication token
+# Obtain from: https://support.plex.tv/articles/204059436-finding-an-authentication-token-x-plex-token/
+PLEX_TOKEN=your-plex-token-here
+
+# Unique client identifier for this MCP instance
+PLEX_CLIENT_ID=plex-mcp-server
+
+# Server port (optional, defaults to 8000)
+PORT=8000