[PHPCS] Extend to check/fix all source code and turn GHA into auto-commit fixer (#1003)

* phpcs: enable also for config, resources and tests

* composer fix-style

* vendor/bin/phpunit -d --update-snapshots

* gha: instead of checking the style, fix and auto-commit it 💪

tests/Console/ModelsCommand/CustomCollection/Models/Simple.php

@@ -1,4 +1,6 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace Barryvdh\LaravelIdeHelper\Tests\Console\ModelsCommand\CustomCollection\Models;
 

tests/Console/ModelsCommand/CustomCollection/Test.php

@@ -1,4 +1,6 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace Barryvdh\LaravelIdeHelper\Tests\Console\ModelsCommand\CustomCollection;
 

tests/Console/ModelsCommand/CustomCollection/__snapshots__/Test__test__1.php

@@ -1,4 +1,6 @@
-<?php declare(strict_types=1);
+<?php
+
+declare(strict_types=1);
 
 namespace Barryvdh\LaravelIdeHelper\Tests\Console\ModelsCommand\CustomCollection\Models;