Add CHANGELOG for v2.3.0

[haydentherapper]

Summary

Release Note

Documentation

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 38.58%. Comparing base (2ef6022) to head (8880c60).
Report is 161 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3789      +/-   ##
==========================================
- Coverage   40.10%   38.58%   -1.53%     
==========================================
  Files         155      200      +45     
  Lines       10044     9823     -221     
==========================================
- Hits         4028     3790     -238     
+ Misses       5530     5486      -44     
- Partials      486      547      +61     

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