Feature Request: Add Tray Icon / Status Bar Integration

[txemi]

Hi @xanmoy,

Thanks for creating and maintaining whatsapp-desktop-client! I've installed it on Linux (Ubuntu) via Snap, and it's working well for messaging.

I would like to request a feature enhancement: the addition of a tray icon (also known as a status bar icon or app indicator).

Expected Behavior:

• When the application is running, an icon is displayed in the system tray/status bar.
• Clicking the tray icon could show/hide the main application window.
• Right-clicking the tray icon could offer options like "Show/Hide Window" and "Quit".
• Ideally, the tray icon would also show an indicator for unread messages.

Benefits:

• Allows users to quickly see if the app is running.
• Provides a convenient way to show/hide the app without keeping it in the taskbar.
• Unread message indicators on the tray icon are very helpful for not missing new messages when the app window is closed or minimized.

This is a common feature in many desktop messaging applications and would greatly improve the user experience on desktop environments.

Thanks for considering this request!