Updated the typo in polars_parser.py

[vignesh1507]

The property dataset_tpye is misspelled. It should be dataset_type.

Fixed code snippet:

@property def dataset_type(self) -> str: return "polars_dataframe"

[longxiaofei]

Not only pandas_parser.py, you can search globally for "dataset_tpye", and typo these.

[vignesh1507]

I've searched globally and i didn't find any typo same as dataset_tpye.

[longxiaofei]

I found 9 cases.

[longxiaofei]

open new pr to typo: https://github.com/Kanaries/pygwalker/pull/643