Added editor page for my mdx

[Code-Hex]

Ref

• https://github.com/bolinfest/monaco-tm
• next-transpile-modules
  • Introduced to avoid SyntaxError: Cannot use import statement outside a module
  • https://dev.to/swyx/how-to-add-monaco-editor-to-a-next-js-app-ha3
• post install
  • https://docs.npmjs.com/cli/v7/using-npm/scripts#examples
• Add support for JSX microsoft/monaco-editor#264

TODO

• Replace example python code with mdx
• Enable JSX
  • Enabled only export variable