v1.8.2+21

chore: Bump version to 1.8.2+21

- Add support for Persian language, Thanks for @chromer030's translation contribution🎉
- Fixed some display issues with UI style under RTL layout
- Add translation statistics graph in `readme`
- Split apk per ABI when releasing new version, only supporting `GitHub/Releases` currently.
- Optimize file structure of CI scripts