ci: add go mod tidy (#9)

Author: AlejandroHerr

.github/workflows/_ci.yaml

@@ -25,3 +25,15 @@ jobs:
         uses: golangci/golangci-lint-action@v8
         with:
           version: ${{ inputs.golangci-version }}
+  tidy:
+    name: Go mod tidy check
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+      - name: Set up Go
+        uses: actions/setup-go@v5
+        with:
+          go-version: ${{ inputs.go-version }}
+          cache: true
+      - uses: katexochen/go-tidy-check@v2