feat: DH-16956: Move fontbootstrap from app-utils to components so it can be consumed in DHE

[dsmmcken]

To fix DH-16956 and also resolve weird Pop OS linux font issues, we should switch enterprise to use the fontsource fonts. Since app-utils is not used in enterprise and can't be imported there, moving fontbootstrap to components under theme seemed like the best solution.

Will need a change in DHE to adopt font-bootstrap once published, and a heads up to enterprise QA that there may be minor e2e test differences similar to what we had in core in #1944

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 44.14%. Comparing base (b369a51) to head (f858a0d).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2545      +/-   ##
==========================================
+ Coverage   43.91%   44.14%   +0.23%     
==========================================
  Files         763      763              
  Lines       42874    42874              
  Branches    11005    10821     -184     
==========================================
+ Hits        18827    18926      +99     
+ Misses      24032    23933      -99     
  Partials       15       15              

Flag	Coverage Δ
unit	44.14% <ø> (+0.23%)	⬆️

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[mattrunyon]

Needs to merge in main to resolve package-lock.json conflict