Feat: add webhook based trigger (#4)

* feat: add dispatch action

.github/workflows/dispatch.yml

@@ -0,0 +1,17 @@
+name: Dispatch to stone-packaging
+
+on:
+  push:
+    branches:
+      - "main"
+
+jobs:
+  dispatch:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Respository dispatch
+        uses: peter-evans/repository-dispatch@v3
+        with:
+          token: ${{ secrets.PAT }}
+          repository: dipdup-io/stone-packaging
+          event-type: prover-update