feat: allow to launch coco across multi monitors

[medcl]

This pull request includes several changes to the src-tauri/src/lib.rs file to improve the application's initialization and window management processes. The most important changes include adding a new function to move the application window to the active monitor, running initialization tasks in the background, and making minor adjustments to function calls and imports.

Improvements to window management:

• Added the move_window_to_active_monitor function to move the application window to the active monitor when the "Open Coco" menu is clicked. This function handles monitor detection and cursor position gracefully. (src-tauri/src/lib.rs)
• Updated the handle_open_coco function to call move_window_to_active_monitor before showing the window and setting its properties. (src-tauri/src/lib.rs)

Background initialization tasks:

• Cloned app_handle to move it into a background task for initializing the application search source. (src-tauri/src/lib.rs)
• Registered the application search source in the background task to improve performance. (src-tauri/src/lib.rs)

Minor adjustments:

• Modified the run function to pass a reference to enable_shortcut. (src-tauri/src/lib.rs)
• Updated imports to include PhysicalPosition and Window. (src-tauri/src/lib.rs)