七麦数据

- improved code syntax highlight

- fix potential crashing bug

- add zoom buttons
- auto-hide appbar on scrolling
- add bookmark/read/note buttons to the end of articles
- better compatible code blocks when system is in dark mode
- other bug fixes / UI improvements

- fix notes not saved bug
- other improvements & bug fixes

- New feature: highlight sentences in the doc and add your own notes!
- add colored bar indicating last read progress for each article
- other UI and logic improvements

- Include images in app assets so that it works 100% offline
- Add button to open a page on doc.flutter.dev in browser
- Reorder items to mirror the official website
- Bug fixes and improvements