ci: add ComfyUI registry publish workflow

Triggers on version tags (v*) using Comfy-Org/publish-node-action.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.github/workflows/publish.yml

@@ -0,0 +1,16 @@
+name: Publish to ComfyUI Registry
+
+on:
+  push:
+    tags:
+      - "v*"
+
+jobs:
+  publish:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Publish to ComfyUI Registry
+        uses: Comfy-Org/publish-node-action@main
+        with:
+          personal_access_token: ${{ secrets.REGISTRY_ACCESS_TOKEN }}