Docs: How to escape special characters in JSDoc property names

You'd never put `#` as an object name for a sane reason... but sometimes you have to deal with CSV. According to the JSDoc docs, it seems like this should do the job:

```js
/**
* @typedef {Object} EmpCsv
* @property {string} Emp#
* @property {string} "First Name"
*/
```

But I get errors...

Asked at https://stackoverflow.com/questions/68946492/how-can-i-escape-special-characters-names-in-jsdoc-typescript.

Start by reproducing the JSDoc typedef and property declarations from the issue in this repository's JavaScript and tsserver setup. Compare the reported errors with the linked Stack Overflow question and document or test the syntax that correctly handles the special-character property names. Done means the example is accepted without the reported errors and the supported usage is clear.

Written by the indexing model from the issue text.