add github workflow

Author: knipknap

.github/workflows/release.yml

@@ -0,0 +1,34 @@
+# Do not edit this file! This workflow should "just work"
+
+name: Announce New Release to Rayforge Registry
+
+# This workflow triggers automatically whenever a new tag matching 'v*.*.*' is pushed.
+on:
+  push:
+    tags:
+      - 'v*.*.*'
+
+jobs:
+  announce-release:
+    name: Announce to Central Registry
+    runs-on: ubuntu-latest
+    steps:
+      - name: Send repository_dispatch event
+        uses: peter-evans/repository-dispatch@v2
+        with:
+          # The central registry repository that will receive the announcement.
+          repository: barebaric/rayforge-registry
+          
+          # This uses the secret you created in your repository settings.
+          token: ${{ secrets.REGISTRY_ACCESS_TOKEN }}
+          
+          # This is the event name the central registry is listening for.
+          event-type: addon-release-published
+          
+          # This is the data payload sent with the announcement.
+          # It includes the tag that triggered the workflow and your repository name.
+          client-payload: >-
+            {
+              "tag": "${{ github.ref_name }}",
+              "repository": "${{ github.repository }}"
+            }