Support qr for quasimatrices

[dlfivefifty]

No description provided.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 91.11%. Comparing base (d844ef4) to head (0297ef3).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #247      +/-   ##
==========================================
+ Coverage   91.09%   91.11%   +0.02%     
==========================================
  Files          19       19              
  Lines        1764     1768       +4     
==========================================
+ Hits         1607     1611       +4     
  Misses        157      157              

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