General package improvements

[gw-moore]

This PR incorporates general improvement to the project.

Code Improvements

• [x] Convert to f-strings

Project Management Improvements

Documentation

• [x] Move README documentation into sphinx docs
• [x] Host the sphinx documentation on gh-pages branch
• [x] Add shied.io badges to README
• [x] Introduce CHANGELOG
• [x] Setup docs hosting with readthedocs
  • See example from my fork of the repo

Project management

• [x] Introduce GitHub issue templates for bugs and feature requests

Package build

• [x] Update setup.py to incorporate package installs for documentation, tests, and development
  • This change make it easy to install the package for develop with python3 -m pip install -e ".[dev]
• [x] Refactor of version.py to _version.py

CI/CD

• [x] Introduce .github workflow to publish to pypi
  • publish-to-test-pypi.yaml is commented out and won't work unit pypi credentials need to be saved to github. See here for more info
• [x] Introduce .github workflow to check code with linters
• [x] Introduce pre-commit to apply code standards on commit
  • Run pre-commit install to enable pre-commit
• [x] Introduce nox to automate local testing, linting, and publishing documentation to gh-pages branch
• [x] Introduce tox to automate local and CI/CD testing

Linting

• [x] Introduce black formatting
• [x] Introduce flake8
• [x] Introduce isort
• [x] Introduce interrogate to check docstring coverage
• [x] Introduce interrogate hooks