feat: implement PHP linter

.github/workflows/lint-php.yml

@@ -0,0 +1,53 @@
+name: Lint php
+
+on: pull_request
+
+permissions:
+  contents: read
+
+concurrency:
+  group: lint-php-${{ github.head_ref || github.run_id }}
+  cancel-in-progress: true
+
+jobs:
+  php-lint:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        php-versions:
+          - "8.1"
+          - "8.2"
+          - "8.3"
+          - "8.4"
+
+    name: php-lint
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+        with:
+          persist-credentials: false
+
+      - name: Set up php ${{ matrix.php-versions }}
+        uses: shivammathur/setup-php@ec406be512d7077f68eed36e63f4d91bc006edc4 # v2.35.4
+        with:
+          php-version: ${{ matrix.php-versions }}
+          coverage: none
+          ini-file: development
+
+      - name: Lint
+        run: composer run lint
+
+  summary:
+    permissions:
+      contents: none
+    runs-on: ubuntu-latest
+    needs: php-lint
+
+    if: always()
+
+    name: php-lint-summary
+
+    steps:
+      - name: Summary status
+        run: if ${{ needs.php-lint.result != 'success' && needs.php-lint.result != 'skipped' }}; then exit 1; fi