Sticker-convert

- Fix wasticker creation
- Do not print double newline in colab

- Fix CLI crash if no credential files given
- Fix incorrect parameter name and types set in ipynb
- Explain steps and power in readme

- Fix crash in v2.6.1

**(Broken release)**
- Fix not asking yes/no when ask about continue to download kakao static stickers instead
- Fix not answering prompt properly during run

- Display warning if not default directory name and contains files not related to sticker_convert
- Only move files that seem to be related to sticker_convert
- Execute download and upload in separate process, allowing them to be cancelled
- Cleanup multiprocessing code
- Cleanup callback system
- Gracefully shutdown on KeyboardInterrupt
- Redact CredOption during exception
- Sanitize telegram token with strip()
- Fix crash when downloading line emoji
- Fix typing with pylint
- Fix formatting with ruff
- Fix test cases
- Code cleanup
- Update dependencies

Fix stickers in/output directory defaults to site-packages