Add CS check to build

.github/workflows/check-style.yml

@@ -0,0 +1,46 @@
+name: Check Codestyle
+
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+    branches:
+      - "*"
+  # Allow manually triggering the workflow.
+  workflow_dispatch:
+
+# Cancels all previous workflow runs for the same branch that have not yet completed.
+concurrency:
+  # The concurrency group contains the workflow name and the branch name.
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  fix-style:
+    name: Fix Code Style
+    timeout-minutes: 15
+    runs-on: ubuntu-latest
+    env:
+      COMPOSER_NO_INTERACTION: 1
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v3
+
+      - name: Setup PHP
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: 8.x
+          coverage: none
+          tools: composer, cs2pr
+
+      - name: Install dependencies
+        run: |
+          composer update --prefer-dist --no-suggest --no-progress --no-interaction
+      - name: Check Code Style
+        run: vendor/bin/phpcs --report-full --report-checkstyle=./phpcs-report.xml
+
+      - name: Show PHPCS results in PR
+        run: cs2pr ./phpcs-report.xml
+