test: add codecov test collection

Author: aqeelat

.github/workflows/test.yml

@@ -47,7 +47,13 @@ jobs:
         run: bun run check
 
       - name: Run tests
-        run: bun run test -- --coverage
+        run: bun run test -- --coverage --reporter=junit
+
+      - name: Upload test results to Codecov
+        if: ${{ !cancelled() }}
+        uses: codecov/test-results-action@v1
+        with:
+          token: ${{ secrets.CODECOV_TOKEN }}
 
       - name: Upload test coverage
         uses: codecov/codecov-action@v5