feat(docs): enhance documentation and UI consistency

- Updated the index.html to dynamically set the theme color based on user selection, improving user experience during theme switching.
- Modified proxy.ts to include 'icon.png' in the matcher for better asset handling.
- Added a new icon.png file for enhanced branding.
- Improved metadata in layout.tsx and page.tsx files for better clarity and consistency in documentation.
- Updated various documentation files to reflect the new branding of 'Cursor Byok' and ensure consistent terminology throughout.
- Removed outdated blog entries and added new content to better align with the current product direction.

apps/docs/app/[lang]/layout.tsx

@@ -15,20 +15,20 @@ export async function generateMetadata(props: LayoutProps<'/[lang]'>): Promise<M
     return {
       metadataBase: new URL(siteUrl),
       title: {
-        default: 'cursor-byok Docs',
-        template: '%s | cursor-byok',
+        default: 'Cursor Byok Docs',
+        template: '%s | Cursor Byok',
       },
-      description: 'Installation, model configuration, and troubleshooting guide for cursor-byok.',
+      description: 'Installation, model configuration, and troubleshooting guide for Cursor Byok.',
     };
   }
 
   return {
     metadataBase: new URL(siteUrl),
     title: {
-      default: 'cursor-byok 文档',
-      template: '%s | cursor-byok',
+      default: 'Cursor Byok 文档',
+      template: '%s | Cursor Byok',
     },
-    description: 'cursor-byok 的安装、模型配置与故障排查指南。',
+    description: 'Cursor Byok 的安装、模型配置与故障排查指南。',
   };
 }