GitHub Actions linter job (#3093)

Author: pivovarit

.github/workflows/gha-lint.yml

@@ -0,0 +1,15 @@
+name: Continuous Integration
+
+on:
+  pull_request:
+
+jobs:
+  actionlint:
+    runs-on: ubuntu-latest
+    name: Lint workflows
+    steps:
+      - uses: actions/checkout@v5
+      - name: Check workflow files
+        uses: docker://rhysd/actionlint:latest
+        with:
+          args: -color