sort template workflows by required vram (#6285)

## Summary

Resolves https://github.com/Comfy-Org/ComfyUI_frontend/issues/6281 by
implementing the stubbed out vram sorting. Previously was waiting for it
to be added to the templates data and it now has
(https://github.com/Comfy-Org/workflow_templates/blob/main/templates/index.json)

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-6285-sort-template-workflows-by-required-vram-2976d73d36508164a8f9fab438f53b21)
by [Unito](https://www.unito.io)

src/platform/workflow/templates/types/template.ts

@@ -18,6 +18,10 @@ export interface TemplateInfo {
   date?: string
   useCase?: string
   license?: string
+  /**
+   * Estimated VRAM requirement in bytes.
+   */
+  vram?: number
   size?: number
 }