Adds Pandas JSON data loaders

[bryangalindo]

This change introduces an extension of the Pandas read_json method found (here) and the Pandas to_json method found (here).

Changes

• hamilton/plugins/pandas_extensions.py
• tests/plugins/test_pandas_extensions.py

How I tested this

• Successfully ran unit tests for py3.11 locally using the following command in the root directory: pytest tests/
• Successfully ran unit tests for py3.7-3.10 using docker run command found here.

Notes

N/A

Checklist

• PR has an informative and human-readable title (this will be pulled into the release notes)
• Changes are limited to a single goal (no scope creep)
• Code passed the pre-commit check & code is left cleaner/nicer than when first encountered.
• Any change in functionality is tested
• New functions are documented (with a description, list of inputs, and expected output)
• Placeholder code is flagged / future TODOs are captured in comments
• Project documentation has been updated if adding/changing functionality.