Tailscale tray menu and UI for Plasma Desktop

Features

- Control your Tailscale connection from the tray
- Show IPs
- Show current connection status of your devices
- Overview of your network and network status
- Set and change your Tailscale exit node
- Proper multi account handling
- Tail drive support - Working with davfs2 support + additional help setting up davfs2 and mounting etc
- Send files to any device on your Tailnet directly from the tray menu
- Get notified and receive files from any device on your Tailnet to a pre-defined location on disk