refactor(nodes): add computed attr for width/height and absolute position

packages/svelte/src/lib/container/NodeRenderer/NodeRenderer.svelte

@@ -40,10 +40,10 @@
 <div class="svelte-flow__nodes">
   {#each $visibleNodes as node (node.id)}
     {@const posOrigin = getPositionWithOrigin({
-      x: node.positionAbsolute?.x ?? 0,
-      y: node.positionAbsolute?.y ?? 0,
-      width: (node.size?.width || node.width) ?? 0,
-      height: (node.size?.height || node.height) ?? 0,
+      x: node.computed?.positionAbsolute?.x ?? 0,
+      y: node.computed?.positionAbsolute?.y ?? 0,
+      width: node.computed?.width ?? node.width ?? 0,
+      height: node.computed?.height ?? node.height ?? 0,
       origin: node.origin
     })}
     <NodeWrapper
@@ -61,20 +61,23 @@
         node.connectable ||
         ($nodesConnectable && typeof node.connectable === 'undefined')
       )}
-      positionX={node.positionAbsolute?.x ?? 0}
-      positionY={node.positionAbsolute?.y ?? 0}
+      positionX={node.computed?.positionAbsolute?.x ?? 0}
+      positionY={node.computed?.positionAbsolute?.y ?? 0}
       positionOriginX={posOrigin.x ?? 0}
       positionOriginY={posOrigin.y ?? 0}
       isParent={!!node[internalsSymbol]?.isParent}
       style={node.style}
       class={node.class}
-      type={node.type}
+      type={node.type || 'default'}
       sourcePosition={node.sourcePosition}
       targetPosition={node.targetPosition}
       dragging={node.dragging}
       zIndex={node[internalsSymbol]?.z ?? 0}
       dragHandle={node.dragHandle}
-      initialized={(!!node.width && !!node.height) || (!!node.size?.width && !!node.size?.height)}
+      width={node.width}
+      height={node.height}
+      initialized={(!!node.computed?.width && !!node.computed?.height) ||
+        (!!node.width && !!node.height)}
       {resizeObserver}
       on:nodeclick
       on:nodemouseenter