Update badge to ITensor code style, skip markdown files in pre-commit hook, run tests when toggling PR as draft

[mtfishman]

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.30%. Comparing base (93c7d55) to head (4e1c18b).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #12   +/-   ##
=======================================
  Coverage   99.30%   99.30%           
=======================================
  Files           1        1           
  Lines         144      144           
=======================================
  Hits          143      143           
  Misses          1        1           

Flag	Coverage Δ
docs	0.00% <ø> (ø)

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