feat(vuepress): 配置vite打包器及本地搜索功能

- 使用 viteBundler 配置 Vite，添加 SCSS 预处理器选项
- 启用主题的本地搜索功能以提升用户体验
- 更新 devDependencies，新增 @vuepress/plugin-search 并升级 sass-embedded 版本
- 优化导航栏样式，调整 .vp-navbar .auto-link 相关 CSS
- 重构 Java SDKMAN 和 Maven 版本管理文档，完善指令说明和操作步骤
- 修改 sidebar 配置，增加根路径禁用侧边栏显示

package.json

@@ -13,8 +13,9 @@
   },
   "devDependencies": {
     "@vuepress/bundler-vite": "2.0.0-rc.22",
-    "@vuepress/plugin-git": "^2.0.0-rc.99",
-    "sass-embedded": "~1.80.0",
+    "@vuepress/plugin-git": "2.0.0-rc.99",
+    "@vuepress/plugin-search": "2.0.0-rc.99",
+    "sass-embedded": "^1.87.0",
     "vue": "^3.5.13",
     "vuepress": "2.0.0-rc.22",
     "vuepress-theme-hope": "2.0.0-rc.85"