Tracking issue for tauri-hotkey migration

[lemarier]

We should use https://github.com/tauri-apps/tauri-hotkey-rs

• Expose the manager somehow so tauri can re-use it
• Add new event type Hotkey or something similar
• Use tauri-hotkey for Windows menu accelerators
• Make sure accelerators sent to custom menu use Hotkey struct or string compatible with tauri-hotkey

[lucasfernog]

I think a good approach would be moving the key bindings from tauri-hotkey to a tauri-keys repo, and add a new formatting function, to_gtk_string or something like that. Then we can use it on both libs.