Add possibility to write tsx in tsx

# Description
I want to write code like this:
```tsx
import { DeepClient } from "@deep-foundation/deeplinks/imports/client";
import type { Link } from "@deep-foundation/deeplinks/imports/minilinks";

async ({ deep }: {deep: DeepClient}) => {
const React = await deep.import('react');
const { Box } = await deep.import('@chakra-ui/react');

return ({ style, link }: {style: object, link: Link}) => {
return
UI for {link?.id || 0} goes here.

}
}
```
And see its preview. But the only thing I see is error `editor evalClientHandler error SyntaxError: Unexpected token 'export'`

# Expected Behavior
This code to work

# Actual behavior
This code not working

# Why I need this
I write in VSCode and like to have strong types and auto completion. I write this way for async handlers by using workaround (removing export statement in output code). I think we should fix this for both types of handlers