chore: lighter prod dependencies

[regisb]

We move development dependencies to devDependencies, such that npm install --omit=dev becomes faster and more lightweight. In the case of frontend-app-profile, this changes shaves off a few hundred MB of disk space.

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 66.90%. Comparing base (85d3eca) to head (c0e77bf).
Report is 12 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1193   +/-   ##
=======================================
  Coverage   66.90%   66.90%           
=======================================
  Files          51       51           
  Lines         855      855           
  Branches      177      178    +1     
=======================================
  Hits          572      572           
  Misses        272      272           
  Partials       11       11           

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[mphilbrick211]

Hi @regisb! Just flagging some conflicts have popped up.

[regisb]

Let's wait until we find an agreement here: openedx/frontend-platform#787