Sticker-convert

- Fix unable to compress to GIF (Bug introduced in 2.8.3)
- Fix not trying to produce best quality when size_max is 0
- Fix not moving mp3 into archives
- bg_color specified as rrggbbaa instead of rrggbb, allow setting bg_color with alpha!=0
- Update readme

- Add linebreak to example of Viber share links
- Auto detect viber share links
- Update readme

- Add support for downloading viber stickers
- Download multiple files with async
- Fix adapting rookiepy but not updating rookiepy to 0.4.0, leading to not able to get Line cookies
- Update github action versions
- Update dependencies

- Compatibility with telegram api 7.2
- FIx downloading and uploading telegram stickers (140)
- Support for sticker pack with mixed sticker formats
- Maximum sticker count is 120 for both static and animated sticker packs
- FIx telegram emoji pack maximum sticker count to 200 (was 120)
- Use custom fork of signalstickers-client
- Update dependencies

- Fix bug where animated stickers are not accepted by WhatsApp since v2.8.0
- It was noted that pywebp would collapse all frames.
- aed005b attempted to fix this by creating webp with variable frame duration.
- However, the webp created would not be accepted by WhatsApp.
- Solution: If there is duplicated frame, use Pillow to save WebP if available, or else use pywebp and display warning.
- Better compliance with wastickers format
- Fix compression success not shown if success on step 0

- Add option for padding (`--padding-percent`)
- Allow auto retry for telegram down/upload
- Fix deadlock if no files to compress
- Fix hanging during cancel job on Windows