Update unique id docs

[pld]

Break out unique ID docs into its own page

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 27.1%. Comparing base (115c4f4) to head (db9613d).
Report is 16 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##              main   #3481     +/-   ##
=========================================
- Coverage     27.2%   27.1%   -0.1%     
- Complexity     742     745      +3     
=========================================
  Files          276     275      -1     
  Lines        13811   13920    +109     
  Branches      2504    2525     +21     
=========================================
+ Hits          3764    3780     +16     
- Misses        9540    9618     +78     
- Partials       507     522     +15     

Flag	Coverage Δ
engine	64.3% <ø> (-0.4%)	⬇️
geowidget	12.5% <ø> (+1.1%)	⬆️
quest	5.5% <ø> (-0.1%)	⬇️

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see 6 files with indirect coverage changes