Add Codecov workflow for coverage reporting

Author: e-riveras

.github/workflows/codecov.yml

@@ -0,0 +1,30 @@
+name: Code Coverage
+on: [push, pull_request]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Set up Python
+        uses: actions/setup-python@v4
+        with:
+          python-version: '3.10'
+
+      - name: Install dependencies
+        run: |
+          pip install pytest pytest-cov
+
+      - name: Run tests and generate coverage
+        run: pytest --cov=. --cov-report=xml
+
+      - name: Upload coverage to Codecov
+        uses: codecov/codecov-action@v5
+        with:
+          token: ${{ secrets.CODECOV_TOKEN }}
+          file: ./coverage.xml
+          flags: unittests
+          name: codecov-umbrella
+          fail_ci_if_error: true
+          verbose: true