fix: named export

Author: LingyuCoder

src/index.ts

@@ -1,2 +1,2 @@
-export { default as RspackDevServer } from './server';
+export { Server as RspackDevServer } from './server';
 export type { DevServer as Configuration } from '@rspack/core';

src/server.ts

@@ -3084,4 +3084,4 @@ class Server<
   }
 }
 
-export default Server;
+export { Server };

src/servers/BaseServer.ts

@@ -8,7 +8,7 @@
  * https://github.com/webpack/webpack-dev-server/blob/main/LICENSE
  */
 
-import type Server from '../server';
+import type { Server } from '../server';
 import type { ClientConnection } from '../types';
 
 // base class that users should extend if they are making their own

src/servers/SockJSServer.ts

@@ -9,7 +9,7 @@
  */
 
 import * as sockjs from 'sockjs';
-import type Server from '../server';
+import type { Server } from '../server';
 import type {
   ClientConnection,
   EXPECTED_ANY,

src/servers/WebsocketServer.ts

@@ -9,7 +9,7 @@
  */
 
 import WebSocket from 'ws';
-import type Server from '../server';
+import type { Server } from '../server';
 import type { ClientConnection, WebSocketServerConfiguration } from '../types';
 import BaseServer from './BaseServer';