[ui] Add "Create widget" VSCode task for scaffolding widgets

After crrev.com/c/6556183 we have a way to scaffold a widget.
This CL adds a Task inside VSCode so that we can do it from
the VSCode UI.

The usage is:
* Select ">Tasks: Run Task" in the command palette.
* Select "Create Widget" task
* Supply the widget path in the prompt.
* Supply the widget name.

Then, it creates the widget for you in the given path
with the given name.

Bug: none
Change-Id: I42d6676954a3ef4d4bcf820964f9c55757013cf9
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/6554646
Commit-Queue: Danil Somsikov <dsv@chromium.org>
Reviewed-by: Danil Somsikov <dsv@chromium.org>
Auto-Submit: Ergün Erdoğmuş <ergunsh@chromium.org>

Author: ergunsh

.vscode/devtools-workspace-tasks.json

@@ -24,6 +24,43 @@
           }
         }
       ]
+    },
+   {
+    "label": "Create Widget",
+    "type": "shell",
+    "command": "node",
+    "args": [
+      "${workspaceFolder}/scripts/scaffold/scaffold-widget.js",
+      "${input:widgetPath}",
+      "${input:widgetName}"
+    ],
+    "options": {
+      "cwd": "${workspaceFolder}"
+    },
+    "problemMatcher": [],
+    "presentation": {
+      "echo": true,
+      "reveal": "always",
+      "focus": false,
+      "panel": "shared",
+      "showReuseMessage": false,
+      "clear": false
+    },
+    "group": {
+      "kind": "build",
+      "isDefault": false
+    }
+  }],
+  "inputs": [
+    {
+      "id": "widgetPath",
+      "type": "promptString",
+      "description": "Enter the path to create the widget (e.g., front_end/panels/ai_assistance)"
+    },
+    {
+      "id": "widgetName",
+      "type": "promptString",
+      "description": "Enter the WidgetName (PascalCase, e.g., MyWidget)"
     }
   ]
 }