refactor(CodeViewer): change children prop type to React.ReactNode

- Updated the children prop type in CodeViewer from string to React.ReactNode for improved flexibility in rendering various content types.

src/renderer/src/components/CodeViewer.tsx

@@ -12,7 +12,7 @@ import styled from 'styled-components'
 
 interface CodeViewerProps {
   language: string
-  children: string
+  children: React.ReactNode
   expanded?: boolean
   wrapped?: boolean
   onHeightChange?: (scrollHeight: number) => void