[Refactor] Extract global window litegraph as a composable (#2380)

src/hooks/litegraphHooks.ts

@@ -0,0 +1,27 @@
+// @ts-strict-ignore
+import {
+  ContextMenu,
+  DragAndScale,
+  LGraph,
+  LGraphBadge,
+  LGraphCanvas,
+  LGraphGroup,
+  LGraphNode,
+  LLink,
+  LiteGraph
+} from '@comfyorg/litegraph'
+
+/**
+ * Assign all properties of LiteGraph to window to make it backward compatible.
+ */
+export const useGlobalLitegraph = () => {
+  window['LiteGraph'] = LiteGraph
+  window['LGraph'] = LGraph
+  window['LLink'] = LLink
+  window['LGraphNode'] = LGraphNode
+  window['LGraphGroup'] = LGraphGroup
+  window['DragAndScale'] = DragAndScale
+  window['LGraphCanvas'] = LGraphCanvas
+  window['ContextMenu'] = ContextMenu
+  window['LGraphBadge'] = LGraphBadge
+}