add coverage workflow

Author: Baptouuuu

.github/workflows/coverage.yml

@@ -0,0 +1,34 @@
+name: Coverage
+
+on:
+  workflow_call:
+
+jobs:
+  runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [ubuntu-latest, macOS-latest]
+        php-version: ['8.2', '8.3']
+        dependency-versions: ['lowest', 'highest']
+    name: 'Coverage'
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: Setup PHP
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: ${{ matrix.php-version }}
+          extensions: mbstring, intl
+          coverage: xdebug
+      - name: Composer
+        uses: "ramsey/composer-install@v3"
+        with:
+          dependency-versions: ${{ matrix.dependencies }}
+      - name: BlackBox
+        run: php blackbox.php
+        env:
+          ENABLE_COVERAGE: 'true'
+          BLACKBOX_SET_SIZE: 1
+      - uses: codecov/codecov-action@v4
+        with:
+          token: ${{ secrets.CODECOV_TOKEN }}