fix(svelte): update import statements and bump peer dependency for v5 (#10645)

Author: mingjunlu

.changeset/calm-spiders-listen.md

@@ -0,0 +1,5 @@
+---
+"@astrojs/svelte": minor
+---
+
+Bumps Svelte 5 peer dependency to `^5.0.0-next.90` and support its latest breaking changes

packages/integrations/svelte/client-v5.js

@@ -1,5 +1,5 @@
 import { hydrate, mount, unmount } from 'svelte';
-import { add_snippet_symbol } from 'svelte/internal';
+import { add_snippet_symbol } from 'svelte/internal/client';
 
 // Allow a slot to be rendered as a snippet (dev validation only)
 const tagSlotAsSnippet = import.meta.env.DEV ? add_snippet_symbol : (s) => s;

packages/integrations/svelte/package.json

@@ -53,7 +53,7 @@
   },
   "peerDependencies": {
     "astro": "^4.0.0",
-    "svelte": "^4.0.0 || ^5.0.0-next.56",
+    "svelte": "^4.0.0 || ^5.0.0-next.90",
     "typescript": "^5.3.3"
   },
   "engines": {

packages/integrations/svelte/server-v5.js

@@ -1,4 +1,4 @@
-import { add_snippet_symbol } from 'svelte/internal';
+import { add_snippet_symbol } from 'svelte/internal/server';
 import { render } from 'svelte/server';
 
 // Allow a slot to be rendered as a snippet (dev validation only)