Add threshold to modalities from filetypes
Fix modalities false positives for
- https://huggingface.co/datasets/chenxx1/jia
- https://huggingface.co/datasets/proj-persona/PersonaHub
- https://huggingface.co/datasets/BAAI/Infinity-Instruct
- https://huggingface.co/datasets/m-a-p/COIG-CQIA
- https://huggingface.co/datasets/Magpie-Align/Magpie-Pro-300K-Filtered

I added two thresholds to get less false positives:
- one general threshold to ignore file types that are <10% of the files
- one additional threshold specific to images in presence of csv/json/parquet, since images are often used in README as figures 

cc @severo 

This should take care of most false positives, and we can refine later if needed
Add threshold to modalities from filetypes: Fix modalities false positives for
- https://huggingface.co/datasets/chenxx1/jia
- https://huggingface.co/datasets/proj-persona/PersonaHub
- https://huggingface.co/datasets/BAAI/Infinity-Instruct
- https://huggingface.co/datasets/m-a-p/COIG-CQIA
- https://huggingface.co/datasets/Magpie-Align/Magpie-Pro-300K-Filtered

I added two thresholds to get less false positives:
- one general threshold to ignore file types that are <10% of the files
- one additional threshold specific to images in presence of csv/json/parquet, since images are often used in README as figures 

cc @severo 

This should take care of most false positives, and we can refine later if needed