Add HACS validation workflow

.github/workflows/hacs.yaml

@@ -0,0 +1,20 @@
+name: Validate with HACS
+
+on:  # yamllint disable-line rule:truthy
+  push:
+    branches:
+      - main
+  pull_request:
+  schedule:
+    - cron: "0 0 * * *"
+  workflow_dispatch:
+
+jobs:
+  validate-hacs:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: HACS validation
+        uses: hacs/action@main
+        with:
+          category: integration

.github/workflows/hassfest.yaml

@@ -1,4 +1,3 @@
----
 name: Validate with hassfest
 
 on:  # yamllint disable-line rule:truthy
@@ -8,6 +7,7 @@ on:  # yamllint disable-line rule:truthy
   pull_request:
   schedule:
     - cron: "0 0 * * *"
+  workflow_dispatch:
 
 jobs:
   validate:

.github/workflows/typing.yaml

@@ -1,4 +1,3 @@
----
 name: Typing
 
 on:  # yamllint disable-line rule:truthy