feat: Migrate to uv from pipenv

[DhavalGojiya]

Description

This PR migrates the project from Pipenv to uv, while preserving the exact locked dependency versions.

Feature Added

• Moved from Pipenv to uv for dependency management.
• Removed dynamic PyPI versioning that was previously handled by setuptools-scm. We can now create a PR during release time (Bump x.y.z Release) or directly push a commit to master before release.
• Removed setuptools as a base dependency for Pysolr since the required backend tools are installed automatically when running build commands like python -m build or uv build.
• Removed tox.ini. Tests are now run using uv, which is much faster and requires minimal configuration.
• Added pre-commit as a dev dependency group, making it easy to run pre-commit locally using:
  uv run pre-commit run --all-files
• Added the uv-lock pre-commit hook to ensure the environment stays in sync with our codebase. It also helps the pre-commit CI bot detect errors when the environment goes out of sync.

Removed Files

• Pipfile
• Pipfile.lock
• setup.py
• tox.ini

Rename

• .github/workflows/tox.yml --> .github/workflows/ci.yml
• Job name tox --> test

[DhavalGojiya]

Been working on this continuously for the last 7 hours 😅

setuptools as a build backend is really horrible. I wasted 4 hours just trying to get the configuration right and finally gave up, switching to the Hatchling backend instead.

Hatchling requires zero configuration, provides sensible defaults, and is extremely fast builds complete in just a few milliseconds.

EDIT: Let's stick with the setuptools build backend for now.

[cclauss]

#514 (reply in thread)

[DhavalGojiya]

So, should we stick with the setuptools backend for the first PR?

[DhavalGojiya]

@cclauss Done :)

[cclauss]

Very impressive! Thanks.