Explicitly ignore Git data directory in `editorconfig-checker`

.ecrc

@@ -6,6 +6,7 @@
   "SpacesAftertabs": false,
   "NoColor": false,
   "Exclude": [
+    "^.git/",
     "^.idea/",
     "^.php-cs-fixer.cache$",
     "^doc/wayback_machine/",

.github/workflows/composer_validate.yaml

@@ -17,4 +17,8 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - name: Validate files
-        run: composer validate --working-dir="${{ matrix.dir }}" --strict --no-check-version
+        run: >
+          composer validate
+          --working-dir="${{ matrix.dir }}"
+          --strict
+          --no-check-version

.github/workflows/editorconfig_checker.yaml

@@ -0,0 +1,14 @@
+name: EditorConfig Check
+on:
+  push:
+  pull_request:
+permissions:
+  contents: read
+jobs:
+  editorconfig_checker:
+    name: Execute `editorconfig-checker`
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Execute `php-cs-fixer`
+        uses: docker://mstruebing/editorconfig-checker:2.7.2