Setup prettier

[luka-nextcloud]

📝 Summary

• Resolves: stylelint broken after migrating from webpack to vite #6449

🚧 TODO

• Install @nextcloud/prettier-config and eslint-config-prettier
• Format code with prettier
• Add flow .github/workflows/lint-prettier.yml
• Remove flow stylelint

🏁 Checklist

• Code is properly formatted (npm run lint / npm run stylelint / composer run cs:check)
• Sign-off message is added to all commits
• Tests (unit, integration and/or end-to-end) passing and the changes are covered with tests
• Documentation (README or documentation) has been updated or is not required

[codecov]

Codecov Report

Attention: Patch coverage is 63.91220% with 559 lines in your changes missing coverage. Please review.

Project coverage is 51.86%. Comparing base (544a4e7) to head (810eb74).
Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
src/nodes/Details.js	21.27%	74 Missing ⚠️
src/services/y-websocket.js	1.38%	71 Missing ⚠️
src/services/SyncService.js	0.00%	51 Missing ⚠️
src/services/PollingBackend.js	0.00%	43 Missing ⚠️
src/nodes/Preview.js	32.75%	39 Missing ⚠️
src/extensions/UserColor.js	0.00%	28 Missing ⚠️
src/services/SessionApi.js	3.57%	27 Missing ⚠️
src/nodes/TaskItem.js	29.41%	24 Missing ⚠️
src/nodes/ImageView.vue	4.16%	23 Missing ⚠️
src/views/RichWorkspace.vue	0.00%	19 Missing ⚠️
... and 32 more

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #7087      +/-   ##
==========================================
+ Coverage   51.70%   51.86%   +0.15%     
==========================================
  Files         479      479              
  Lines       40846    41461     +615     
  Branches      993     1004      +11     
==========================================
+ Hits        21121    21504     +383     
- Misses      19620    19852     +232     
  Partials      105      105              

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