Maintenance cleanup

[blink1073]

• Use hatch envs for cov, test, and docs
• Use Flake8-pyproject to avoid .flake8 file
• Clean up main workflow file
• Add rollup check for branch protection
• Add python 3.11 test
• Rename readthedocs file for recommended name

[codecov-commenter]

Codecov Report

Base: 65.17% // Head: 65.17% // No change to project coverage 👍

Coverage data is based on head (4a0c260) compared to base (f05a0d6).
Patch has no changes to coverable lines.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #325   +/-   ##
=======================================
  Coverage   65.17%   65.17%           
=======================================
  Files          22       22           
  Lines        1743     1743           
  Branches      290      331   +41     
=======================================
  Hits         1136     1136           
  Misses        522      522           
  Partials       85       85           

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[blink1073]

I'm not sure what to do about fix-license-headers, I'm going to leave it failing.