added github workflow for test coverage with codecov

Author: toramanlis

.github/workflows/ci.yml

@@ -0,0 +1,20 @@
+name: Workflow for code coverage
+on: [push, pull_request]
+jobs:
+  run:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: Set up php 8.3
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: '8.3'
+      - name: Install dependencies
+        run: composer self-update && composer install && composer dump-autoload
+      - name: Run tests and collect coverage
+        run: vendor/bin/phpunit --coverage-clover coverage.xml .
+      - name: Upload coverage to Codecov
+        uses: codecov/codecov-action@v5
+        env:
+          CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}