Add pgtuner_mcp to Community Servers (#3059)

* add pgtuner_mcp mcp server in README.md

* make alphabetical order

Author: isdaniel

README.md

@@ -1191,6 +1191,7 @@ search, and comprehensive file analysis.
 - **[Peacock for VS Code](https://github.com/johnpapa/peacock-mcp)** - MCP Server for the Peacock extension for VS Code, coloring your world, one Code editor at a time. The main goal of the project is to show how an MCP server can be used to interact with APIs.
 - **[persistproc](https://github.com/irskep/persistproc)** - MCP server + command line tool that allows agents to see & control long-running processes like web servers.
 - **[Pexels](https://github.com/garylab/pexels-mcp-server)** - A MCP server providing access to Pexels Free Image API, enabling seamless search, retrieval, and download of high-quality royalty-free images.
+- **[pgtuner_mcp](https://github.com/isdaniel/pgtuner_mcp)** - provides AI-powered PostgreSQL performance tuning capabilities.
 - **[Pharos](https://github.com/QuentinCody/pharos-mcp-server)** - Unofficial MCP server for the Pharos database by the National Center for Advancing Translational Sciences (NCATS), providing access to target, drug, and disease information for drug discovery research.
 - **[Phone MCP](https://github.com/hao-cyber/phone-mcp)** - 📱 A powerful plugin that lets you control your Android phone. Enables AI agents to perform complex tasks like automatically playing music based on weather or making calls and sending texts.
 - **[PIF](https://github.com/hungryrobot1/MCP-PIF)** - A Personal Intelligence Framework (PIF), providing tools for file operations, structured reasoning, and journal-based documentation to support continuity and evolving human-AI collaboration across sessions.