Feat/friends

[LargeModGames]

This pull request introduces a new Friends feature, including a full Friends screen, friend management flows, and live now-playing status integration, all backed by spotatui.com. It also improves clipboard support on Linux Wayland and fixes key handling in the Friends UI. The implementation involves significant changes to the app state, background tasks, and platform-specific dependencies.

Friends feature and UI:

• Added a new "Friends" entry to the library and implemented a complete Friends screen, including friend-code display, online filtering, inline name search, and live now-playing status for followed users.
• Added friend management flows: users can add friends by code or username search, unfollow friends, and the Friends screen periodically refreshes in the background while open.

Now-playing and sync integration:

• Implemented background syncing of now-playing status to spotatui.com, including track change and heartbeat updates, and clearing the status on exit.

Platform and dependency updates:

• Enabled Linux arboard clipboard support with Wayland data-control, ensuring clipboard operations work reliably on Wayland sessions. Platform-specific dependency configuration for arboard was added for Linux, macOS, and Windows.

Bug fixes:

• Fixed Friends-specific key handling so that Friends UI actions take precedence over conflicting global shortcuts.