Documentation updates

[JWCook]

Updates #432

• Update issue and PR templates
• Only link to stable release docs
• Hide list of release versions from main page toctree
• Use sphinx-design dropdown instead of custom toggle class
• Add OpenGraph metadata
• Include class summary in automodule docs
• Split user guide into basic and advanced usage
• Add user guide for API client class

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (80bd3a1) 96.35% compared to head (568be52) 96.35%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #526   +/-   ##
=======================================
  Coverage   96.35%   96.35%           
=======================================
  Files          58       58           
  Lines        3294     3296    +2     
  Branches      643      643           
=======================================
+ Hits         3174     3176    +2     
  Misses         88       88           
  Partials       32       32           

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