Add lint GitHub Action

Note that this action does not simply run the `make lint` command.
We directly use the `golangci-lint` GitHub Action that also creates
annotations in GitHub with the found problems.
The `make lint` command present is still supported though
for easy local linting.

Signed-off-by: Matej Pavlovic <[email protected]>

.github/workflows/test.yml

@@ -35,3 +35,40 @@ jobs:
 
       - name: Test
         run: make test
+  golangci:
+    name: lint
+    runs-on: ubuntu-latest
+    steps:
+      - name: Set up Golang
+      - uses: actions/setup-go@v3
+        with:
+          go-version: 1.18
+          check-latest: true
+
+      - name: Checkout
+        uses: actions/checkout@v3
+
+      - name: golangci-lint
+        uses: golangci/golangci-lint-action@v3
+        with:
+          # Optional: version of golangci-lint to use in form of v1.2 or v1.2.3 or `latest` to use the latest version
+          version: latest
+
+          # Optional: working directory, useful for monorepos
+          # working-directory: somedir
+
+          # Optional: golangci-lint command line arguments.
+          # args: --issues-exit-code=0
+
+          # Optional: show only new issues if it's a pull request. The default value is `false`.
+          # only-new-issues: true
+
+          # Optional: if set to true then the all caching functionality will be complete disabled,
+          #           takes precedence over all other caching options.
+          # skip-cache: true
+
+          # Optional: if set to true then the action don't cache or restore ~/go/pkg.
+          # skip-pkg-cache: true
+
+          # Optional: if set to true then the action don't cache or restore ~/.cache/go-build.
+          # skip-build-cache: true