Improve Jest expect types

[Mrtenz]

This improves the expect function types by:

• Adding documentation to each matcher.
• Removing duplication between the regular and asymmetric matchers.
• Removing the need to import expect from @jest/globals (though this is still recommended by Jest).

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 96.59%. Comparing base (0eda215) to head (69fc744).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2308   +/-   ##
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  Coverage   96.59%   96.59%           
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  Files         337      337           
  Lines        7615     7615           
  Branches     1180     1180           
=======================================
  Hits         7356     7356           
  Misses        259      259           

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