fix: 删除冗余日志并更新页面标题

- 删除了多余的控制台输出语句
- 更新页面标题为“Fullstack Starter”

src/index.ts

@@ -1 +0,0 @@
-console.log('Hello via Bun!')

src/routes/__root.tsx

@@ -16,7 +16,7 @@ export const Route = createRootRoute({
         content: 'width=device-width, initial-scale=1',
       },
       {
-        title: 'TanStack Start Starter',
+        title: 'Fullstack Starter',
       },
     ],
     links: [