Suggestion: Integrate with pydantic

[MRigal]

Hi,

pydantic is known to be a blazing fast model validator. There is already this tool to validate GeoJSON using it. Maybe both tools/functionalities could be merged, as pydantic is probably the best way to validate, but considering that you add also fixing.

Maybe you could contribute fixing to the other library and focus here on using pydantic at core but offering fixing GeoJSONs in the streamlit app.

Best and thanks for the work,
Matthieu