Provide basic CSS formatting for markdown rendered in description fields for the sandbox

### Issue Description

Markdown is supported and rendered correctly in the sandbox but it seems the reset.css is removing some of the default styles the browser would apply. It would be great to add some basic styles for things like tables and use the browsers defaults as much as possible here.

| Default | Example with some minor CSS applied |
| -------- | ------- |
| | |

### Link to Reproduction

[CodeSandbox](https://codesandbox.io/p/devbox/brave-forest-76pjwj?file=%2Fsrc%2Findex.js)

### Reproduction Steps

You can view the [default rendered markdown here](https://codesandbox.io/p/devbox/brave-forest-76pjwj?file=%2Fsrc%2Findex.js) in the query description

Start with the linked CodeSandbox at src/index.js and inspect the query description's rendered markdown and the reset styles affecting it. Trace that rendering into the sandbox source, then verify that tables and other basic markdown elements retain usable browser-like formatting without the reset removing their defaults.

Written by the indexing model from the issue text.