docs: dev snippets

[machow]

this PR adds documentation for common snippets I use when testing docs

[codecov-commenter]

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Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 89.08%. Comparing base (665734c) to head (403e327).
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Additional details and impacted files

@@           Coverage Diff           @@
##             main     #408   +/-   ##
=======================================
  Coverage   89.08%   89.08%           
=======================================
  Files          40       40           
  Lines        3041     3041           
=======================================
  Hits         2709     2709           
  Misses        332      332           

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