ci: add YAML linter

.github/workflows/lint-yaml.yaml

@@ -0,0 +1,63 @@
+# Generated by Gabo (https://github.com/ashishb/gabo)
+---
+# Run this locally with act - https://github.com/nektos/act
+# act -j lintYaml
+name: Lint YAML
+
+on:  # yamllint disable-line rule:truthy
+  push:
+    branches: [main, master]
+    paths:
+      - '**.yml'
+      - '**.yaml'
+      - '.github/workflows/**.yml'
+      - '.github/workflows/**.yaml'
+  pull_request:
+    branches: [main, master]
+    paths:
+      - "**.yml"
+      - "**.yaml"
+      - ".github/workflows/**.yml"
+      - ".github/workflows/**.yaml"
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+# Ref: https://docs.github.com/en/actions/writing-workflows/choosing-what-your-workflow-does/controlling-permissions-for-github_token
+permissions:
+  contents: read
+
+jobs:
+  lintYaml:
+    runs-on: ubuntu-latest
+    timeout-minutes: 15
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          persist-credentials: false
+
+      - name: Check YAML files with linter
+        uses: ibiqlik/action-yamllint@v3
+        with:
+          # All files under base dir
+          file_or_dir: "."
+          config_data: |
+            extends: default
+            yaml-files:
+              - '*.yaml'
+              - '*.yml'
+            rules:
+              document-start:
+                level: warning
+              line-length:
+                level: warning
+              new-line-at-end-of-file:
+                level: warning
+              trailing-spaces:
+                level: warning
+
+      - name: Lint GitHub Actions
+        uses: reviewdog/action-actionlint@v1