refactor: simplify MDX options in next.config.ts

chore: update Radix UI dependencies to latest versions

chore: update Next.js and related packages to latest versions

style: add sidebar color variable in globals.css

refactor: remove Chart component and related logic

next.config.ts

@@ -3,10 +3,7 @@ import createMDX from '@next/mdx';
 const path = require('path')
 
 const withMDX = createMDX({
-  options: {
-    jsx: true,
-    jsxImportSource: '@mdx-js/react',
-  },
+  options: {},
 })
 
 const nextConfig: NextConfig = {