* feat: add diff algorithm
* feat: implement DiffHook
* feat: add rust/typescript API
* feat: use u8 to enable SIMD
* feat: add SIMD support
* test: add a failed test case
* revert: change to unicode index
* fix: text event index correctness when using utf8 or unicode
* fix: use unicode index
* fix: apply delta
* fix: remove splice_unicode
---------
Co-authored-by: Zixuan Chen <remch183@outlook.com>
