Enhanced PHP fixer

[christianlupus]

Closes #1008
Closes #619

This should be easy to rebase. Thus, it should be merged if no big upcoming PRs regarding the backend are WIP.

[codecov]

Codecov Report

Merging #1011 (848988a) into master (fe66d88) will decrease coverage by 15.07%.
The diff coverage is 50.00%.

❗ Current head 848988a differs from pull request most recent head d14ba50. Consider uploading reports for the commit d14ba50 to get more accurate results

@@             Coverage Diff             @@
##           master    #1011       +/-   ##
===========================================
- Coverage   42.13%   27.05%   -15.08%     
===========================================
  Files          44       32       -12     
  Lines        1875     1619      -256     
===========================================
- Hits          790      438      -352     
- Misses       1085     1181       +96     

Flag	Coverage Δ
migration	?
unittests	27.05% <50.00%> (-10.55%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
lib/AppInfo/Application.php	0.00% <ø> (ø)
lib/Controller/ConfigController.php	100.00% <ø> (ø)
lib/Controller/MainController.php	100.00% <ø> (ø)
lib/Controller/RecipeController.php	100.00% <ø> (ø)
lib/Db/DbTypesPolyfillHelper.php	0.00% <ø> (ø)
lib/Db/RecipeDb.php	0.00% <ø> (ø)
lib/Helper/AcceptHeaderParsingHelper.php	100.00% <ø> (ø)
lib/Helper/ImageService/ImageFileHelper.php	100.00% <ø> (ø)
lib/Helper/ImageService/ImageGenerationHelper.php	100.00% <ø> (ø)
lib/Helper/ImageService/ThumbnailFileHelper.php	97.05% <ø> (ø)
... and 35 more

[github-actions]

Unit Test Results

     24 files       24 suites   8m 39s ⏱️
   200 tests    200 ✔️ 0 💤 0 ❌
2 400 runs  2 400 ✔️ 0 💤 0 ❌

Results for commit d14ba50.

♻️ This comment has been updated with latest results.