Move workflows to .github/workflows

.github/workflows/composer-install.yml

@@ -0,0 +1,29 @@
+name: Run Composer Install
+
+jobs:
+  ComposerInstall:
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        operating-system: ['ubuntu-latest']
+        php-versions: ['8.0', '8.1']
+
+    steps:
+      - uses: actions/checkout@v3
+
+      - name: Cache Composer packages
+        id: composer-cache
+        uses: actions/cache@v3
+        with:
+          path: vendor
+          key: ${{ runner.os }}-php-${{ matrix.php-versions }}-${{ hashFiles('**/composer.json') }}
+          restore-keys: |
+            ${{ runner.os }}-php-${{ matrix.php-versions }}-
+            ${{ runner.os }}-php-
+
+      - name: Composer (PHP ${{ matrix.php-versions }})
+        uses: php-actions/composer@v6
+        with:
+          php_version: ${{ matrix.php-versions }}
+          args: --no-progress --prefer-dist --optimize-autoloader