feat: add Aurora Menu and related features (#55)

- Implemented Aurora Menu with recent items and shortcuts.
- Added icon selection for the menu.
- Introduced Lock Key Indicators for Caps Lock and Num Lock states.
- Added Low Battery Percentage indicator for battery status below 20%.
- Implemented Focus Launched Windows to focus on newly opened windows.
- Updated preferences metadata to include new options for Aurora Menu.
- Enhanced styles for Aurora Menu and indicators.

Author: leandromqrs