DEV: Add the d-compat branch workflow (#101)

Author: cvx

.github/workflows/d-compat-branch.yml

@@ -0,0 +1,10 @@
+name: Create new d-compat branch
+
+on:
+  workflow_dispatch:
+  schedule:
+    - cron: "0 0 * * *"
+
+jobs:
+  ci:
+    uses: discourse/.github/.github/workflows/create-d-compat-branch.yml@v1