eventID and synonym documentation

[jracusin]

Description

This PR includes documentation for eventID and synonym groups, including how they are assigned, searched, modified, and cited.

Related Issue(s)

Resolves #2732

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 1 line in your changes missing coverage. Please review.

Project coverage is 5.93%. Comparing base (9fc7b85) to head (c49aabf).
Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
app/routes/circulars._archive._index/route.tsx	0.00%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff            @@
##            main   #2837      +/-   ##
========================================
- Coverage   5.93%   5.93%   -0.01%     
========================================
  Files        171     171              
  Lines       4329    4330       +1     
  Branches     474     475       +1     
========================================
  Hits         257     257              
- Misses      4070    4071       +1     
  Partials       2       2              

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