Add prettier

[michaelneu]

No description provided.

[codecov-io]

Codecov Report

Merging #12 into master will decrease coverage by 0.72%.
The diff coverage is 56.29%.

@@            Coverage Diff             @@
##           master      #12      +/-   ##
==========================================
- Coverage   71.88%   71.16%   -0.73%     
==========================================
  Files         120      120              
  Lines        2049     2185     +136     
  Branches      323      338      +15     
==========================================
+ Hits         1473     1555      +82     
- Misses        576      630      +54

Flag	Coverage Δ
#backend	80.12% <70.24%> (-0.19%)	⬇️
#frontend	62.21% <44.32%> (-1.23%)	⬇️

Impacted Files	Coverage Δ
backend/test/services/mock/index.ts	100% <ø> (ø)	⬆️
frontend/src/components/placeholder.tsx	80% <ø> (ø)	⬆️
frontend/src/components/fade-container.tsx	60% <0%> (-15%)	⬇️
frontend/src/components/headerbar.tsx	60% <0%> (-15%)	⬇️
frontend/src/components/form-editor.tsx	30.23% <0%> (-0.72%)	⬇️
frontend/src/components/activity-event.tsx	36.84% <0%> (ø)	⬆️
frontend/src/components/blur-container.tsx	60% <0%> (-15%)	⬇️
frontend/src/components/login-image.tsx	68.75% <0%> (+4.04%)	⬆️
frontend/src/components/page-wrapper.tsx	67.85% <0%> (-8.15%)	⬇️
frontend/src/components/notification.tsx	66.66% <0%> (-6.07%)	⬇️
... and 81 more

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[phntxx]

works