feat(Minimap): add nodeComponent prop

packages/svelte/src/lib/plugins/Minimap/MinimapNode.svelte

@@ -1,5 +1,7 @@
 <script lang="ts">
   import type { ClassValue } from 'svelte/elements';
+  import type { Component } from 'svelte';
+  import type { MiniMapNodeProps } from './types';
 
   let {
     x,
@@ -12,7 +14,8 @@
     strokeColor,
     strokeWidth = 2,
     selected,
-    class: className
+    class: className,
+    nodeComponent
   }: {
     x: number;
     y: number;
@@ -25,20 +28,39 @@
     strokeWidth?: number;
     selected?: boolean;
     class?: ClassValue;
+    nodeComponent?: Component<MiniMapNodeProps>;
   } = $props();
 </script>
 
-<rect
-  class={['svelte-flow__minimap-node', className]}
-  class:selected
-  {x}
-  {y}
-  rx={borderRadius}
-  ry={borderRadius}
-  {width}
-  {height}
-  style:fill={color}
-  style:stroke={strokeColor}
-  style:stroke-width={strokeWidth}
-  shape-rendering={shapeRendering}
-/>
+{#if nodeComponent}
+  {@const CustomComponent = nodeComponent}
+  
+  <CustomComponent 
+    {x}
+    {y}
+    {width}
+    {height}
+    {borderRadius}
+    class={className}
+    {color}
+    {shapeRendering}
+    {strokeColor}
+    {strokeWidth}
+    {selected}
+  />
+{:else}
+  <rect
+    class={['svelte-flow__minimap-node', className]}
+    class:selected
+    {x}
+    {y}
+    rx={borderRadius}
+    ry={borderRadius}
+    {width}
+    {height}
+    style:fill={color}
+    style:stroke={strokeColor}
+    style:stroke-width={strokeWidth}
+    shape-rendering={shapeRendering}
+  />
+{/if}