doc: add dual navigation buttons and cleanup some docstrings

[AbeCoull]

Issue #, if available:

Description of changes:

Testing done:

Merge Checklist

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General

• [ ] I have read the CONTRIBUTING doc
• [ ] I used the commit message format described in CONTRIBUTING
• [ ] I have updated any necessary documentation, including READMEs and API docs (if appropriate)

Tests

• [ ] I have added tests that prove my fix is effective or that my feature works (if appropriate)
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[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 100.00%. Comparing base (e6775d5) to head (803263c). Report is 29 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##              main      #758   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files          135       135           
  Lines         9033      9033           
  Branches      1037      1037           
=========================================
  Hits          9033      9033           

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