feat(svelte): add zIndexMode

packages/react/src/types/component-props.ts

@@ -692,5 +692,11 @@ export interface ReactFlowProps<NodeType extends Node = Node, EdgeType extends E
    * Allows localization, customization of ARIA descriptions, control labels, minimap labels, and other UI strings.
    */
   ariaLabelConfig?: Partial<AriaLabelConfig>;
+  /**
+   * Used to define how z-indexing is calculated for nodes and edges.
+   * 'auto' is for selections and sub flows, 'basic' for selections only, and 'manual' for no auto z-indexing.
+   *
+   * @default 'auto'
+   */
   zIndexMode?: ZIndexMode;
 }