docs: add ci and crates badges

[calebdw]

This just adds some more badges to the readme

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 86.46%. Comparing base (7d3d6ea) to head (4da26af).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #112   +/-   ##
=======================================
  Coverage   86.46%   86.46%           
=======================================
  Files         172      172           
  Lines      109526   109526           
=======================================
  Hits        94703    94703           
  Misses      14823    14823           

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