fix: remove hatch-regex dependency and update CI pipelines

[ppswaroopa]

This PR resolves PyPI build failure and implements layers of additional protection to catch packaging regressions early.

Here are the complete details for your Pull Request to completely cover everything we just accomplished!

What changed

1. PyPI Build Fix: Removed the pseudo-dependency hatch-regex from pyproject.toml's build-system.requires list. Hatchling natively supports regex-based version extraction, so this missing PyPI package was unnecessarily failing the build.
2. Preventative PR Check: Added a new build-check verification job to .github/workflows/ci.yml. GitHub Actions will now explicitly run python3 -m build for every PR, ensuring no bad dependencies can break main.
3. Local Fast Checks: Added a developer quality-of-life script at scripts/install_hooks.sh. Generating a local pre-push Git hook, this spins up an isolated /tmp virtual environment (to bypass strict Linux PEP-668 restrictions) and verifies the package builds correctly before allowing the push to reach the remote.
4. Documentation: Updated CHANGELOG.md with these new CI safety nets, and added the Publish to PyPI workflow status badge to the README.md.

Validation

• Local tests using python3 -m build successfully generate the .tar.gz and .whl files.
• Verified the local pre-push hook builds dynamically inside a temporary isolated virtual environment and correctly blocks pushes on build failure.
• Badges check and changelog formatting reviewed and passing visually.

[ppswaroopa]

Okay