[fix] Adjust type imports to satisfy TS NodeNext moduleResolution (#5360)

Discovered through comment in #2040
This is necessary so people can use this new resolution mode and still get proper typings for things like $app/stores
This isn't all that's needed though:
- Vite 3 is needed so we get their exports map which makes vite/client resolve correctly
- Svelte bump needed to properly expose CompileOptions. It's imported from a path which isn't accessible when adhering to export maps

Co-authored-by: Simon <[email protected]>

Author: dummdidumm

.changeset/healthy-wasps-poke.md

@@ -0,0 +1,5 @@
+---
+'@sveltejs/kit': patch
+---
+
+Adjust type imports to satisfy TS NodeNext moduleResolution

packages/kit/types/index.d.ts

@@ -1,7 +1,7 @@
 /// <reference types="svelte" />
 /// <reference types="vite/client" />
 
-import './ambient';
+import './ambient.js';
 
 import { CompileOptions } from 'svelte/types/compiler/interfaces';
 import {
@@ -17,8 +17,8 @@ import {
 	ResponseHeaders,
 	RouteDefinition,
 	TrailingSlash
-} from './private';
-import { SSRNodeLoader, SSRRoute, ValidatedConfig } from './internal';
+} from './private.js';
+import { SSRNodeLoader, SSRRoute, ValidatedConfig } from './internal.js';
 
 export interface Adapter {
 	name: string;

packages/kit/types/internal.d.ts

@@ -12,15 +12,15 @@ import {
 	ResolveOptions,
 	Server,
 	SSRManifest
-} from './index';
+} from './index.js';
 import {
 	HttpMethod,
 	JSONObject,
 	MaybePromise,
 	RequestOptions,
 	ResponseHeaders,
 	TrailingSlash
-} from './private';
+} from './private.js';
 
 export interface ServerModule {
 	Server: typeof InternalServer;