feat: Add actionlint test

Author: andrewferrier

.github/workflows/tests.yaml

@@ -8,6 +8,18 @@ on:
     branches: [main]
 
 jobs:
+  actionlint:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v6
+      - name: Download actionlint
+        id: get_actionlint
+        run: bash <(curl https://raw.githubusercontent.com/rhysd/actionlint/main/scripts/download-actionlint.bash)
+        shell: bash
+      - name: Check workflow files
+        run: ${{ steps.get_actionlint.outputs.executable }} -color
+        shell: bash
+
   stylua:
     runs-on: ubuntu-latest
     steps: