* feat: add Display Profiles builtin control center widget
Adds a new built-in widget that lets users switch between their configured
display profiles directly from the Control Center, without opening Settings.
- Widget shows the active profile name and cycles profiles on pill click
- Detail panel shows all profiles as a button group for direct selection
- Integrates with existing DisplayConfigState/SettingsData singletons
- Follows the same loader/instance pattern as VPN, CUPS, and Tailscale widgets
* fix: refine display profiles widget behavior
bbedward