v4.0.0

## Changelog
### General
- Design changes: App is now a Single Page Application with a sidebar, making it easier to navigate and do multiple tasks at a time. Many other UI elements have been redesigned.
- Improved updater UI
- Added Windows Arm build
- Improved default format selection
- Bug fixes
- Created discord server - https://discord.gg/BnjYbTDfF

### Homepage
- Added batch download support
- Added support to auto download media
- Added option to set output format for video
- Added option to view the yt-dlp command
- Minor UI/UX improvements
- Improved download start speed
- Video bitrate is shown in format list
- Added pause option

### Playlist page
- Added Selective mode
- Improved UI of download items
- Improved menu UI

### Compressor page
- Minor optimizations

### Preferences page
- Added UI zoom support
- Added global hotkey support
- Added option to select update channels
- Added option to paste individual site cookies
- Improved output template setting
- Added ability to set yt-dlp channel, use system yt-dlp, ability to use system ffmpeg & ffprobe
- Improved language selection