Add Update Timeline Activity Client and Docs

[clayandgen]

closes https://github.com/OpenC3/cosmos-enterprise/issues/513

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[codecov]

Codecov Report

❌ Patch coverage is 15.38462% with 11 lines in your changes missing coverage. Please review.
✅ Project coverage is 78.25%. Comparing base (65a6a0a) to head (6849648).
⚠️ Report is 6 commits behind head on main.

Files with missing lines	Patch %	Lines
openc3/lib/openc3/script/calendar.rb	15.38%	11 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3037      +/-   ##
==========================================
+ Coverage   78.23%   78.25%   +0.02%     
==========================================
  Files         673      673              
  Lines       55239    55248       +9     
  Branches      728      728              
==========================================
+ Hits        43215    43235      +20     
+ Misses      11946    11935      -11     
  Partials       78       78              

Flag	Coverage Δ
python	79.46% <ø> (-0.02%)	⬇️
ruby-api	83.53% <ø> (+0.39%)	⬆️
ruby-backend	81.37% <15.38%> (-0.01%)	⬇️

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