add minimum distance tests for the GeneralizedToricCode and improve documentation for TrivariateTricycleCode

[Fe-r-oz]

This PR adds minimum distance tests for the GeneralizedToricCode and improve documentation for TrivariateTricycleCode.

• The code is properly formatted and commented.
• Substantial new functionality is documented within the docs.
• All new functionality is tested.
• All of the automated tests on github pass.
• We recently started enforcing formatting checks. If formatting issues are reported in the new code you have written, please correct them.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 85.36%. Comparing base (11dd3e5) to head (51bfd64).

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #591      +/-   ##
==========================================
+ Coverage   85.32%   85.36%   +0.03%     
==========================================
  Files         123      123              
  Lines        7504     7504              
==========================================
+ Hits         6403     6406       +3     
+ Misses       1101     1098       -3     

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[nzy1997]

Looks good! Thank you for the tests and the documentations!