**Windows Navigation**

Adds a new UMWindowsNavigationManager class that provides keyboard-driven
window navigation and management capabilities. Key features include:

- Ctrl+Period/Comma shortcuts to cycle between non-root windows
- Ctrl+(Forward)Slash to toggle between root and non-root windows
- Automatic window tracking and focus management (WIP)
- Support for window activation and focus state handling

I've also created a few debugging utilities (widgets) to track the
behavior of the currently opened // minimized windows.

** Tabs Navigation **
1. Completed documentation for Tabs Navigation Manager functions.
2. Refactor some code.
3. Cleanup deprecated methods.

Author: BarakXYZ