jsx (html) snippets

I'd like to suggest an enhancement since a large part of writing React is jsx and we lose a lot of helpful snippets available when writing html with .html snippets.

For example, when writing my render function I would like to be able to write 'div', hit tab, and then get

```

Start by locating the existing HTML snippet definitions and the JSX/React snippet entry points in the repository. Compare their expansion behavior, then add equivalent JSX coverage for the requested example and verify that typing “div” followed by Tab produces the shown element with cursor placement.

Written by the indexing model from the issue text.