Relands "Add support for LiteGraph to convert to classes" (#667)

* Revert "Revert "Add support for LiteGraph to convert to classes (#334)" (#386)"

This reverts commit d607f6c7f7.

* Format

src/types/litegraph-augmentation.d.ts

@@ -14,6 +14,13 @@ declare module '@comfyorg/litegraph' {
      * If the node is a frontend only node and should not be serialized into the prompt.
      */
     isVirtualNode?: boolean
+
+    addDOMWidget(
+      name: string,
+      type: string,
+      element: HTMLElement,
+      options: Record<string, any>
+    ): DOMWidget
   }
 
   interface IWidget<TValue = any, TOptions = any> {
@@ -67,4 +74,8 @@ declare module '@comfyorg/litegraph' {
       slotPos: Vector2
     ): number
   }
+
+  interface ContextMenu {
+    root?: HTMLDivElement
+  }
 }