chore: migrate to pnpm v11

[danielroe]

📚 Description

this migrates us to pnpm v11, and - in particular - to moving to allowBuilds

[netlify]

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 30.18%. Comparing base (7b8338b) to head (64b7268).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #956   +/-   ##
=======================================
  Coverage   30.18%   30.18%           
=======================================
  Files          12       12           
  Lines         328      328           
  Branches       98       98           
=======================================
  Hits           99       99           
  Misses        229      229           

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