doc: simplify and improve consistency

[imrn99]

Description

Associated issue: closes #259

Content description:

• simplifies a bunch of entries
• improve consistency overall
• simplify must_use attribute messages
• comment out unused strong-typed IDs

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 42.85714% with 12 lines in your changes missing coverage. Please review.

Project coverage is 77.47%. Comparing base (b67a8ad) to head (c2aa217).

Files with missing lines	Patch %	Lines
honeycomb-core/src/cmap/builder/structure.rs	36.84%	12 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #263      +/-   ##
==========================================
+ Coverage   77.41%   77.47%   +0.06%     
==========================================
  Files          49       48       -1     
  Lines        6784     6776       -8     
==========================================
- Hits         5252     5250       -2     
+ Misses       1532     1526       -6     

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