ci(github): create lint.yml

Author: remarkablemark

.github/workflows/lint.yml

@@ -0,0 +1,15 @@
+name: lint
+on: [push, pull_request]
+
+permissions:
+  contents: read
+
+jobs:
+  lint:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v6
+
+      - name: Validate YAML
+        run: yamllint -d relaxed .