Fix: Rename .php_cs to .php-cs-fixer.php

[localheinz]

This pull request

• renames .php_cs to .php-cs-fixer.php

[codecov]

Codecov Report

Merging #383 (0dd0718) into main (c96284a) will not change coverage.
The diff coverage is n/a.

❗ Current head 0dd0718 differs from pull request most recent head 4aea76c. Consider uploading reports for the commit 4aea76c to get more accurate results

@@            Coverage Diff            @@
##               main     #383   +/-   ##
=========================================
  Coverage     90.04%   90.04%           
  Complexity      151      151           
=========================================
  Files            23       23           
  Lines           432      432           
=========================================
  Hits            389      389           
  Misses           43       43           

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