chore: add prettier, commitlint & lefthook

[marcus-sa]

Summary of changes

lefthook runs commands for git hooks.

actionlint can be found here https://github.com/rhysd/actionlint

#518
https://discord.com/channels/759513055117180999/759513055607783478/1176510854783578113

Relinquishment of Rights

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• I waive and relinquish all rights regarding this changes (including code, text, and images) to Deepkit UG (limited), Germany. This changes (including code, text, and images) are under MIT license without name attribution, copyright notice, and permission notice requirement.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (29a1a17) 77.77% compared to head (3424b8b) 77.77%.

❗ Current head 3424b8b differs from pull request most recent head 986001a. Consider uploading reports for the commit 986001a to get more accurate results

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Additional details and impacted files

@@           Coverage Diff           @@
##           master     #520   +/-   ##
=======================================
  Coverage   77.77%   77.77%           
=======================================
  Files         188      188           
  Lines       20091    20091           
  Branches     5202     5202           
=======================================
  Hits        15625    15625           
  Misses       4466     4466           

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[marcj]

thanks @marcus-sa !

[timvandam]

Prettier 🙌🚀