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.

.claude/settings.json

@@ -0,0 +1,19 @@
+{
+  "permissions": {
+    "allow": [
+      "WebSearch",
+      "WebFetch",
+      "Read(~/.cache/**/*)",
+      "Edit(~/.cache/**/*)",
+      "Bash",
+      "Bash(curl *)",
+      "Bash(wget *)",
+      "Bash(ls *)",
+      "Bash(cd *)",
+      "Bash(mkdir *)",
+      "Bash(* --version)",
+      "Bash(* --help *)",
+      "mcp__MiniMax__web_search"
+    ]
+  }
+}