Add the Comfy Registry publish workflow

.github/workflows/publish_action.yml

@@ -0,0 +1,26 @@
+name: Publish to Comfy Registry
+
+# Publishes the node pack to registry.comfy.org whenever the version in
+# pyproject.toml changes on main, or when run by hand from the Actions tab.
+# Needs the REGISTRY_ACCESS_TOKEN repository secret (a Comfy Registry API key).
+on:
+  workflow_dispatch:
+  push:
+    branches:
+      - main
+    paths:
+      - "pyproject.toml"
+
+jobs:
+  publish-node:
+    name: Publish custom node to the registry
+    runs-on: ubuntu-latest
+    # Forks have no registry key; skip instead of failing.
+    if: ${{ github.repository_owner == 'spicyapi-ai' }}
+    steps:
+      - name: Check out code
+        uses: actions/checkout@v4
+      - name: Publish custom node
+        uses: Comfy-Org/publish-node-action@main
+        with:
+          personal_access_token: ${{ secrets.REGISTRY_ACCESS_TOKEN }}