feat: ✨ support frontend node description (originally @melMass) (#5187)

src/lib/litegraph/src/LGraphNode.ts

@@ -218,6 +218,7 @@ export class LGraphNode
   static MAX_CONSOLE?: number
   static type?: string
   static category?: string
+  static description?: string
   static filter?: string
   static skip_list?: boolean
 

src/scripts/app.ts

@@ -918,7 +918,7 @@ export class ComfyApp {
         output_is_list: [],
         output_node: false,
         python_module: 'custom_nodes.frontend_only',
-        description: `Frontend only node for ${name}`
+        description: node.description ?? `Frontend only node for ${name}`
       } as ComfyNodeDefV1
     }