feat: add genSafeVariableName

[danielroe]

import { genImportName } from 'knitwork'

// _4923_32foo
genImportName('123 foo')

[pi0]

Can we also embed a set of reserved keywords to avoid accidentally being used?

A list is here: https://mathiasbynens.be/notes/reserved-keywords

More rules if you like to make more robust: https://mathiasbynens.be/notes/javascript-identifiers#:~:text=Keywords%20are%20tokens%20that%20have,void%20%2C%20while%20%2C%20and%20with%20.

Also what about renaming to more generic genSafeVariableName? I (guess) same convention applies to both.

[pi0]

Something cool just discovered:

https://github.com/mathiasbynens/mothereff.in/tree/master/js-variables

https://mothereff.in/js-variables