Add Waindow to Window Management

[indiveloper]

0. I have read the Contribution Guidelines
1. I confirm that I have read and understood the sections about "AI"-adjacent software
2. Project URL: https://www.waindow.app/
3. Why should this project be added: Waindow is a native, free macOS window utility with linked resizing, window-specific notes, long-page capture, and Keep Awake. It contains no embedded AI and is not a prompt wrapper; optional local Shortcuts, CLI, and MCP access expose the same existing utility actions.
4. End all descriptions with a full stop/period
5. Entry is ordered alphabetically
6. Appropriate icon(s) added if applicable (freeware)