feat(data): add MacrolactoneDB data directory with ml_id column

- Add MacrolactoneDB filtered datasets
- Add ring12_20 and ring16 subdirectories with processed data
- Add ml_id column as unique identifier (ML00000001 format)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

data/MacrolactoneDB/README.md

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+website: https://macrolact.collaborationspharma.com/
+
+通过MacrolactoneDB页面筛选的结果并不准确，我限定16环，但是在下载的csv里面有14环的结果，所以还是要自己进行在筛选一遍。