Update GitHub Actions Workflow

[timothyhull]

Migrate namedtuple-maker testing script from GitHub Action to a test script file.

---

Adjust GitHub Actions workflow such that:

---

1. All push events to feature development branches (not Main or Dev) and all pull request opened events trigger:
   • Linting
   • Pytest testing
2. All push events to the Dev branch trigger:
   • Linting
   • Pytest testing
   • Bumpversion
   • Packaging for Test PyPi/PyPI
   • Package upload to Test PyPI
   • Dependent on the success of all previous workflow steps, pip install the namedtuple-maker from Test PyPI and test functionality.
3. All push events to the Main branch trigger:
   • Linting
   • Pytest testing
   • Package upload to PyPI
   • Dependent on the success of all previous workflow steps, pip install the namedtuple-maker from Test PyPI and test functionality.

---

Update Branch Protection Rules