docs: update README to reflect new features including data grouping and list support

Merge pull request #17 from DylanCaiCoding/2.3.0

chore: update mmkvVersion to 2.3.0 for improved functionality

refactor: replace BaseMMKVProperty with MMKVProperty for improved flexibility

feat: introduce BaseMMKVProperty and refactor related properties for improved structure

feat: add MMKVListProperty for managing lists in MMKV

Merge pull request #15 from darriousliu/fix/update-anr

Update README_ZH.md

Update README.md

fix: StateFlow调用update方法无限循环

Update README.md

Merge pull request #12 from DylanCaiCoding/2.0.1

Update README.md

Update README_ZH.md

perf: Optimize the code of putIfAbsent()