feat: Migrate from Setuptools to Hatchling as the build backend

[DhavalGojiya]

Description

Migrated from Setuptools to the Hatchling build backend.

Hatchling is very fast, requires zero configuration, and provides good defaults.

Working with Setuptools is a painful process - we need to maintain external files like
MANIFEST.in to include/exclude files or folders in the source distribution, whereas
in Hatchling this process is straightforward and handled directly within the same
pyproject.toml.

Removed files

• MANIFEST.in

Test Build

• python -m build OR uv build

1. Source Distribution

2. Wheel Distribution

Official Hatchling documentation:
https://hatch.pypa.io/

[DhavalGojiya]

Now it looks like our GitHub Action workflows are more happier with uv than with tox 🤣🤣

[claudep]

Just for your information, I will stop watching this product as I don't use neither know anything about solr.

[DhavalGojiya]

Just for your information, I will stop watching this product as I don't use neither know anything about solr.