feat: Add visual crop preview widget for ImageCrop node - widget ImageCrop (#7825)

## Summary

Another implementation for image crop node, alternative for
https://github.com/Comfy-Org/ComfyUI_frontend/pull/7014
As discussed with @christian-byrne and @DrJKL we could have single
widget - IMAGECROP with 4 ints and UI preview.

However, this solution requires changing the definition of image crop
node in BE (sent
[here](https://github.com/comfyanonymous/ComfyUI/pull/11594)), which
will break the exsiting workflow, also it would not allow connect
separate int node as input, I am not sure it is a good idea.

So I keep two PRs openned for references

## Screenshots


https://github.com/user-attachments/assets/fde6938c-4395-48f6-ac05-6282c5eb8157

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-7825-feat-Add-visual-crop-preview-widget-for-ImageCrop-node-widget-ImageCrop-2dc6d73d3650812bb8a2cdff4615032b)
by [Unito](https://www.unito.io)

src/schemas/nodeDef/nodeDefSchemaV2.ts

@@ -64,6 +64,21 @@ const zImageCompareInputSpec = zBaseInputOptions.extend({
   options: z.record(z.unknown()).optional()
 })
 
+const zBoundingBoxInputSpec = zBaseInputOptions.extend({
+  type: z.literal('BOUNDINGBOX'),
+  name: z.string(),
+  isOptional: z.boolean().optional(),
+  component: z.enum(['ImageCrop']).optional(),
+  default: z
+    .object({
+      x: z.number(),
+      y: z.number(),
+      width: z.number(),
+      height: z.number()
+    })
+    .optional()
+})
+
 const zMarkdownInputSpec = zBaseInputOptions.extend({
   type: z.literal('MARKDOWN'),
   name: z.string(),
@@ -126,6 +141,7 @@ const zInputSpec = z.union([
   zColorInputSpec,
   zImageInputSpec,
   zImageCompareInputSpec,
+  zBoundingBoxInputSpec,
   zMarkdownInputSpec,
   zChartInputSpec,
   zGalleriaInputSpec,
@@ -169,6 +185,7 @@ type StringInputSpec = z.infer<typeof zStringInputSpec>
 export type ComboInputSpec = z.infer<typeof zComboInputSpec>
 export type ColorInputSpec = z.infer<typeof zColorInputSpec>
 export type ImageCompareInputSpec = z.infer<typeof zImageCompareInputSpec>
+export type BoundingBoxInputSpec = z.infer<typeof zBoundingBoxInputSpec>
 export type ChartInputSpec = z.infer<typeof zChartInputSpec>
 export type GalleriaInputSpec = z.infer<typeof zGalleriaInputSpec>
 export type TextareaInputSpec = z.infer<typeof zTextareaInputSpec>