chore: add HACS validation github action

Author: jaapp

.github/validate.yml

@@ -0,0 +1,17 @@
+name: Validate
+
+on:
+  push:
+  pull_request:
+  schedule:
+    - cron: "0 0 * * *"
+
+jobs:
+  validate:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - name: HACS validation
+        uses: hacs/action@main
+        with:
+          category: integration