add workflows

.github/workflows/validate.yaml

@@ -0,0 +1,19 @@
+name: Validate with HACS
+
+on:
+  push:
+  pull_request:
+  workflow_dispatch:
+  schedule:
+    - cron:  '0 5 * * 6'  
+
+jobs:
+  validate-hacs:
+    runs-on: "ubuntu-latest"
+    steps:
+        - uses: "actions/checkout@v4"
+        - name: HACS validation
+          uses: "hacs/action@main"
+          with:
+            category: "integration"
+