feat: keyboard navigation for bluetooth panel

[j-1in]

Pull Request

Motivation

Improves keyboard oriented workflows.

• When the bluetooth panel is opened. You can navigate items using Ctrl-J, Ctrl-K, , , when the end of a list is reached pressing relevant movement key will go to the previous/next list.
• While an item is selected, you can press enter/return to initiate the main action.

Type of Change

• Bug fix
• New feature
• Breaking change
• Refactoring

Related Issue

• Addresses Pervasive keyboard support for noctalia dialogs #1067

Testing

Tested using the flake and NixOS configuration.

• Tested on niri
• Tested on Hyprland
• Tested on sway
• Tested with different bar positions and density settings
• Tested at different interface scaling values
• Tested with multiple monitors (if applicable)

Screenshots / Videos

recording_20260206_155218.mp4

Checklist

• Code follows project style guidelines
• Self-reviewed my code
• No new warnings or errors
• Documentation or comments updated (if relevant)

Additional Notes

These keybinds make sense to me but am open to other opinions. I'm wondering if I should add keybinds like 'r' for refresh, 'd' for discoverable etc, these would need to be implemented with Shortcut component since there's no functions like onRPressed
Ofc, let me know if there's problem with the code, or visual styling etc.