Implement Documenter documentation pages

[mikeingold]

Changes:

• Adds Documenter.jl documentation infrastructure
• Bumps package version from v0.13.0 to v0.13.1

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 76.77%. Comparing base (feb56fd) to head (b869ef7).
Report is 5 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #58   +/-   ##
=======================================
  Coverage   76.77%   76.77%           
=======================================
  Files           7        7           
  Lines         353      353           
=======================================
  Hits          271      271           
  Misses         82       82           

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