Add Hashable support for CG types

[Kyle-Ye]

No description provided.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 71.78%. Comparing base (1a1b9ad) to head (6891edd).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main       #6   +/-   ##
=======================================
  Coverage   71.78%   71.78%           
=======================================
  Files           9        9           
  Lines         638      638           
=======================================
  Hits          458      458           
  Misses        180      180           

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