Migrate Docs pages to Markdown

[freemansw1]

Resolves #535 and migrates all docs pages (other than API docs) to markdown from RST for ease of use and editing in the future.

• Have you followed our guidelines in CONTRIBUTING.md?
• Have you self-reviewed your code and corrected any misspellings?
• Have you written documentation that is easy to understand?
• Have you written descriptive commit messages?
• Have you added NumPy docstrings for newly added functions?
• Have you formatted your code using black?
• If you have introduced a new functionality, have you added adequate unit tests?
• Have all tests passed in your local clone?
• If you have introduced a new functionality, have you added an example notebook?
• Have you kept your pull request small and limited so that it is easy to review?
• Have the newest changes from this branch been merged?

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 64.70%. Comparing base (188046f) to head (97dc5c3).
⚠️ Report is 61 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #549      +/-   ##
==========================================
+ Coverage   63.55%   64.70%   +1.14%     
==========================================
  Files          27       27              
  Lines        3858     3978     +120     
==========================================
+ Hits         2452     2574     +122     
+ Misses       1406     1404       -2     

Flag	Coverage Δ
unittests	64.70% <ø> (+1.14%)	⬆️

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[github-actions]

Linting results by Pylint:

Your code has been rated at 8.36/10 (previous run: 8.36/10, +0.00)
_{The linting score is an indicator that reflects how well your code version follows Pylint’s coding standards and quality metrics with respect to the main branch.
A decrease usually indicates your new code does not fully meet style guidelines or has potential errors.}