Add prettier-plugin-classnames to oxfmt

[nianiam]

prettier-plugin-classnames

We already have tailwind class sorting, but (at least in my opinion) this is only half the battle with Tailwind classes. The other half is attempting to read incredibly long single lines of classes. This plugin solves that by wrapping the classes to a fixed width, making it significanty easier to parse them:

I am currently running oxfmt generally and prettier for jsx/tsx files essentially just to run this plugin. It would be great to have this built into oxfmt!