build(ci): Add golangci-lint to GitHub CI (#9)

Signed-off-by: jannfis <[email protected]>

.github/workflows/ci.yaml

@@ -52,6 +52,26 @@ jobs:
         run: |
           git diff --exit-code -- .
 
+  lint:
+    permissions:
+      contents: read  # for actions/checkout to fetch code
+      pull-requests: read  # for golangci/golangci-lint-action to fetch pull requests
+    name: Lint Go code
+    runs-on: ubuntu-22.04
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
+      - name: Setup Golang
+        uses: actions/setup-go@0c52d547c9bc32b1aa3301fd7a9cb496313a4491 # v5.0.0
+        with:
+          go-version: ${{ env.GOLANG_VERSION }}
+      - name: Run golangci-lint
+        uses: golangci/golangci-lint-action@3cfe3a4abbb849e10058ce4af15d205b6da42804 # v4.0.0
+        with:
+          version: v1.56.2
+          args: --verbose
+
+
   build-go:
     name: Build & cache Go code
     runs-on: ubuntu-22.04