Render API Reference page

[lukem12345]

Close #139

In this PR, I tried to resolve the referenced issue by explicitly listing all modules and submodules.

Someone should double check that all the modules that we want to include in the docs page are included. (And only those modules we want included.)

I replaced the reference to IDAllocator with one to PartsType.

Further, I cannot render the docs locally due to the following issues that I cannot resolve myself due to lack of familiarity with the internals :

• DefaultVecMap has no docstring. (This may be referring to a different type now?)
• Record has no docstring. (Is it possible to add a docstring for the field of a struct?)
  I temporarily resolved those two bullets by removing the ref in both cases.

I did not review any docstrings aside from those causing those immediate errors.

This is about as far as I can take this issue to being closed. But let me know if there are any commits I can take care of. Thanks!

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 91.95%. Comparing base (a24aeea) to head (eaa6c3f).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #140      +/-   ##
==========================================
+ Coverage   91.81%   91.95%   +0.14%     
==========================================
  Files          23       23              
  Lines        2088     2088              
==========================================
+ Hits         1917     1920       +3     
+ Misses        171      168       -3     

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