Nostur - Nostr client

Added:
- Support for custom emojis
- Muted words list
- More info in Relay Connection Stats
- Toggle to never connect to relay (in Relay Connection Stats)
- Relay information sheet on relay feeds
- Always black background theme
- Refresh button on Hot, Zapped, Funny and Gallery feeds in macOS columns mode
- Show reactions on DMs
- Key export from Settings
- Toggle to strip audio when posting divine video
- Include poster image when posting divine video

Improvements:
- Avoid too many concurrent relay requests
- Improved many levels deep nested quotes rendering
- Optimized DM file handling
- Improved DM relay detection and setup
- Improve voice message audio format detection
- Don't show flip camera button on macOS
- Improved video preview thumb loading
- Improved url detection
- Make easier to tap expand post

Fixes:
- Fixed relay feeds not loading
- Fixed backtick code rendering issues
- Fixed animated .gif/.webp playback hangs
- Fixed crash when playing video
- Fixed own reply showing on feed if replies toggle is not enabled on feed
- Fixed private reaction and DM reaction issues
- Fixed private reply thread issues