Add PI-Desktop to AI coding tools list

[vastsa]

🚀 Summary

Add PI-Desktop to the Code Editors and Assistants section. PI-Desktop is an open-source, local-first desktop workspace for AI coding agents with persistent projects and sessions, model switching, Plan/Goal modes, permission controls, plugins, MCP, and multi-agent orchestration.

✅ Checklist

• I have read the contribution guidelines
• The tool is AI-related and useful for developers
• I have added a short, clear description of the tool
• The link is not a duplicate of an existing one
• The title of the link is properly capitalized
• The link follows the Awesome List format (- [Tool Name](link) – description)
• My change does not include unrelated files or changes

📌 Why is this tool awesome?

PI-Desktop focuses on the work around long-running coding-agent sessions: persistent project context, visible permissions and diffs, model flexibility, and a desktop workspace for coordinating multiple agents. It runs locally on macOS, Windows, and Linux, with public documentation and downloadable releases. The open-source project remains useful without a paid hosted service.

🔗 Link

https://github.com/vastsa/PI-Desktop

📝 Additional context

The entry was added at the end of the Code Editors and Assistants section as requested by the contribution guide.