Add doc report code

[benjeffery]

This (hacky as heck) code generates a report on the doc status of functions and classes. You can see the result at https://lime-onida-78.tiiny.site/

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 89.85%. Comparing base (8342e74) to head (a225bb4). Report is 24 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #3036   +/-   ##
=======================================
  Coverage   89.85%   89.85%           
=======================================
  Files          29       29           
  Lines       32127    32127           
  Branches     5763     5763           
=======================================
  Hits        28867    28867           
  Misses       1859     1859           
  Partials     1401     1401           

Flag	Coverage Δ
c-tests	86.69% <ø> (ø)
lwt-tests	80.78% <ø> (ø)
python-c-tests	89.05% <ø> (ø)
python-tests	98.98% <ø> (ø)

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[benjeffery]

Closing this as I don't think we want this in the codebase, but I'll keep the branch around.