Markdown reader with headers in metadata

[github-actions[bot]]

☂️ Python Coverage

current status: ✅

Overall Coverage

Lines	Covered	Coverage	Threshold	Status
3298	2038	62%	50%	🟢

New Files

No new covered files...

Modified Files

File	Coverage	Status
src/pai_rag/data/rag_dataloader.py	70%	🟢
src/pai_rag/modules/datareader/datareader_factory.py	75%	🟢
TOTAL	72%	🟢

updated for commit: 4ce96da by action🐍