[v4] functional utility with `position` type

[sntran]

What version of Tailwind CSS are you using?

v4.2.1

Reproduction URL

https://play.tailwindcss.com/1KyeyxpXHu?file=css

Describe your issue

There are quite a bit of utilities that use position values, such as background-position, mask, and gradient. It would be nice to be able to define functional utilities using them. I do see position data type so maybe it can be used?

An example like in the Play URL is position-area. I would like to use position-bottom-right utility, instead of position-[bottom_right].