feat(导航栏): 添加切换到Beta版本的链接

在导航栏配置中添加指向Beta站点的外部链接，方便用户切换版本

src/config.ts

@@ -66,6 +66,11 @@ export const navBarConfig: NavBarConfig = {
 	links: [
 		LinkPreset.Home,
 		LinkPreset.Archive,
+		{
+			name: "切换到Beta",
+			url: "https://beta.acofork.com", // Internal links should not include the base path, as it is automatically added
+			external: true, // Show an external link icon and will open in a new tab
+		},
 		{
 			name: "友链",
 			url: "/friends/", // Internal links should not include the base path, as it is automatically added