Add Impact Pack clipspace and SAM Detector integration

Introduces automatic registration of canvas images in ComfyUI's clipspace for Impact Pack compatibility, including a new 'Send to Clipspace' menu option and a method on ComfyNode. Adds monitoring and mask application for SAM Detector results, ensuring seamless mask transfer to LayerForge. Also exposes MaskTool's maskContext property for external access.

js/MaskTool.js

@@ -209,6 +209,9 @@ export class MaskTool {
         maskImage.src = tempCanvas.toDataURL();
         return maskImage;
     }
+    get maskContext() {
+        return this.maskCtx;
+    }
     resize(width, height) {
         this.initPreviewCanvas();
         const oldMask = this.maskCanvas;