feat: add model links for default workflow (#11308)

We now support detecting the missing models when loading the workflow.
But the default workflow didn't include an embedded model link,

so users don't know where to download the model or which one to use.

Users will see an error when loading the default workflow every time, so
I updated it to include the model link.

Before
<img width="1920" height="1050" alt="image"
src="https://github.com/user-attachments/assets/08774480-78ae-41b4-85bd-64b431079ec1"
/>

After

<img width="1920" height="1050" alt="image"
src="https://github.com/user-attachments/assets/dcec5a02-94ad-416f-9881-d761f4137fbd"
/>

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-11308-feat-add-model-links-for-default-workflow-3446d73d365081188978e1d313c38ffe)
by [Unito](https://www.unito.io)

---------

Co-authored-by: GitHub Action <action@github.com>

src/scripts/defaultGraph.ts

@@ -115,7 +115,15 @@ export const defaultGraph: ComfyWorkflowJSON = {
         { name: 'CLIP', type: 'CLIP', links: [3, 5], slot_index: 1 },
         { name: 'VAE', type: 'VAE', links: [8], slot_index: 2 }
       ],
-      properties: {},
+      properties: {
+        models: [
+          {
+            name: 'v1-5-pruned-emaonly-fp16.safetensors',
+            url: 'https://huggingface.co/Comfy-Org/stable-diffusion-v1-5-archive/resolve/main/v1-5-pruned-emaonly-fp16.safetensors',
+            directory: 'checkpoints'
+          }
+        ]
+      },
       widgets_values: ['v1-5-pruned-emaonly-fp16.safetensors']
     }
   ],