fix coverage workflow

Author: AlaaElattar

.github/workflows/coverage.yaml

@@ -20,13 +20,23 @@ jobs:
         uses: dart-lang/setup-dart@v1.6.0
         with:
           sdk: "stable"
+      - name: Setup Flutter
+        uses: subosito/flutter-action@v2
+        with:
+          flutter-version: "3.16.0"
 
       - name: Install Melos
         run: dart pub global activate melos
 
       - name: Install dependencies
         run: melos bootstrap
 
+      - name: Run unit tests
+        run: melos run unit_test
+
+      - name: Create coverage directory
+        run: mkdir -p coverage
+
       - name: Merge coverage
         run: |
           melos exec rm -rf coverage
@@ -38,3 +48,4 @@ jobs:
         uses: codecov/codecov-action@v3
         with:
           token: ${{ secrets.CODECOV_TOKEN }}
+          files: coverage/filtered.lcov.info