Add custom font styles and theme enhancements

- Created a new CSS file for font imports and defined font families for base, mono, strong, em, and h1 elements.
- Added a new JavaScript file to extend the default VitePress theme, incorporating a custom layout and a Vue component for enhanced functionality.
- Integrated Mermaid diagram support and included the necessary styles for it.

openwiki/templates/source.md

@@ -0,0 +1,22 @@
+---
+title: "{原始标题}" # 原始资料的原标题，不翻译。如：论文标题、网页文章标题
+abstract: "{原始摘要}" # 原始资料的原摘要、总结，不翻译。如：论文摘要、网页文章总结
+source: {原始地址} # 原始资料的文件路径或网址，并确保链接正常
+tags: # 仅分类标签，如：论文、专利、会议等
+  - {分类-1}
+  - ...
+created_at: {YYYY-MM-DD} # 页面创建时间
+updated_at: {YYYY-MM-DD} # 页面更新时间
+---
+
+# {原始标题的中文翻译}
+
+{原始摘要的中文翻译}
+
+## 关键结论
+
+- {结论-1}
+- {结论-2}
+- ...
+
+<!-- 正文内容 -->