Refactor: Further state management cleanup (#5727)

## Summary

Going through the GraphNodeManager and VueNodeLifecycle one property at
a time and removing the pieces that are not currently wired up or used
by the rest of the application

Fixes paste location by updating the layoutStore in LGraphCanvas (which
already mutates layoutStore elsewhere)

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-5727-WIP-Refactor-Further-state-management-cleanup-2766d73d36508173b379c6009c194a5a)
by [Unito](https://www.unito.io)

src/lib/litegraph/src/LGraphCanvas.ts

@@ -4032,6 +4032,18 @@ export class LGraphCanvas
 
     // TODO: Report failures, i.e. `failedNodes`
 
+    const newPositions = created.map((node) => ({
+      nodeId: String(node.id),
+      bounds: {
+        x: node.pos[0],
+        y: node.pos[1],
+        width: node.size?.[0] ?? 100,
+        height: node.size?.[1] ?? 200
+      }
+    }))
+
+    layoutStore.batchUpdateNodeBounds(newPositions)
+
     this.selectItems(created)
 
     graph.afterChange()

src/lib/litegraph/src/interfaces.ts

@@ -82,6 +82,7 @@ export interface Positionable extends Parent<Positionable>, HasBoundingRect {
    * @default 0,0
    */
   readonly pos: Point
+  readonly size?: Size
   /** true if this object is part of the selection, otherwise false. */
   selected?: boolean