refactor(配置): 更新代码块和主题相关配置

- 移除旧的highlight.js配置，改用新的code_blocks配置
- 添加snackbar弹窗、instantpage预加载和文本对齐配置
- 优化代码块主题和显示样式

_config.yml

@@ -46,17 +46,7 @@ marked:
   postAsset: true
 relative_link: false
 future: true
-syntax_highlighter: highlight.js
-highlight:
-  line_number: true
-  auto_detect: false
-  tab_replace: ''
-  wrap: true
-  hljs: false
-prismjs:
-  preprocess: true
-  line_number: true
-  tab_replace: ''
+
 
 # Home page setting
 # path: Root path for your blogs index page. (default = '')