[bug] cannot import ts/tsx files in mdx

[jrson83]

Describe the bug

You cannot import TS/TSX files in your MDXs

It is possible to fix the issue in two ways:

1. Create mdx.d.ts and include it in tsconfig.json

declare module '*.mdx' {
  let MDXComponent: (props: Record<string, unknown>) => JSX.Element
  export default MDXComponent
}

2. npm install @types/mdx --save-dev

@itsjavi which do you prefer to integrate in the docs example?