add GrantBirki/json-yaml-validate

.github/config/exclude.txt

@@ -0,0 +1,2 @@
+# gitignore style exclude file for the GrantBirki/json-yaml-validate Action
+.github/

.github/workflows/json-yaml-validate.yml

@@ -0,0 +1,23 @@
+name: actions-config-validation
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+  workflow_dispatch:
+
+permissions:
+  contents: read
+  pull-requests: write # enable write permissions for pull request comments
+
+jobs:
+  actions-config-validation:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: actions-config-validation
+        uses: GrantBirki/json-yaml-validate@3add42f5fa8bfff04a3fe664d27a316736257ef1 # pin@v2.3.1
+        with:
+          comment: "true" # enable comment mode
+          exclude_file: ".github/config/exclude.txt"