Add ComfyUI Registry publishing setup

- pyproject.toml with package metadata (v1.0.0)
- MIT license
- GitHub Actions workflow to auto-publish on pyproject.toml changes

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

pyproject.toml

@@ -0,0 +1,15 @@
+[project]
+name = "comfyui-vace-tools"
+version = "1.0.0"
+description = "Mask and control-frame generation nodes for WanVideo/VACE workflows — supports 10 generation modes, source trimming, and merge-back with optical flow blending."
+license = { file = "LICENSE" }
+requires-python = ">=3.10"
+dependencies = []
+
+[project.urls]
+Repository = "https://github.com/ethanfel/Comfyui-VACE-Tools"
+
+[tool.comfy]
+PublisherId = "ethanfel"
+DisplayName = "VACE Tools"
+Icon = ""