use hatchling

[brittanyrjones]

Pull Request

Summary

Using hatchling instead of setuptools for python backend build.
Fixes #

---

What Changed

---

Using hatchling instead of setuptools for python backend build.

Checklist

• I’ve added or updated unit tests where necessary
• I’ve added or updated documentation
• I've run pdoc3 to generate the documentation
• I’ve manually tested the functionality in this PR
• This pull request is ready for review

---

Testing

Example

ensure build succeeds and that the package configuration is correct in the tar

$ uv build
Building source distribution...
Building wheel from source distribution...
Successfully built dist/heroku_applink-0.1.0.tar.gz
Successfully built dist/heroku_applink-0.1.0-py3-none-any.whl