Add an attributes reference page

[mbabker]

Continuation of #2798 by adding a new attributes reference page. Also includes some minor tweaks and corrections on the annotations page.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 78.36%. Comparing base (0632ab1) to head (e7e528f).
Report is 36 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2813      +/-   ##
==========================================
- Coverage   78.75%   78.36%   -0.39%     
==========================================
  Files         163      167       +4     
  Lines        8593     8626      +33     
==========================================
- Hits         6767     6760       -7     
- Misses       1826     1866      +40     

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[franmomu]

thanks @mbabker!