add codecov

.github/workflows/test.yaml

@@ -0,0 +1,24 @@
+name: Test
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    branches:
+      - main
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v7
+      - name: Set up Go
+        uses: actions/setup-go@v7
+        with:
+          go-version-file: "./go.mod"
+      - name: Run tests
+        run: go test -coverprofile=coverage.txt ./...
+      - name: Upload coverage to Codecov
+        uses: codecov/codecov-action@v7
+        with:
+          token: ${{ secrets.CODECOV_TOKEN }}
+          files: coverage.txt