Added onInit and useInitialized hooks

packages/svelte/src/lib/container/EdgeRenderer/EdgeRenderer.svelte

@@ -1,6 +1,7 @@
 <script lang="ts">
   import { onMount } from 'svelte';
   import { EdgeWrapper } from '$lib/components/EdgeWrapper';
+  import { CallOnMount } from '$lib/components/CallOnMount';
   import { MarkerDefinition } from '$lib/container/EdgeRenderer/MarkerDefinition';
   import { useStore } from '$lib/store';
   import type { DefaultEdgeOptions } from '$lib/types';
@@ -10,6 +11,7 @@
   const {
     elementsSelectable,
     visibleEdges,
+    edgesInitialized,
     edges: { setDefaultOptions }
   } = useStore();
 
@@ -29,7 +31,6 @@
       edge.selectable ||
       ($elementsSelectable && typeof edge.selectable === 'undefined')
     )}
-
     <EdgeWrapper
       id={edge.id}
       source={edge.source}
@@ -61,4 +62,15 @@
       on:edgecontextmenu
     />
   {/each}
+
+  {#if $visibleEdges.length > 0}
+    <CallOnMount
+      onMount={() => {
+        $edgesInitialized = true;
+      }}
+      onDestroy={() => {
+        $edgesInitialized = false;
+      }}
+    />
+  {/if}
 </div>