add support for all property

[eliabexp]

I think tailwind should have support for CSS all property

My suggestion for class names are all-initial, all-unset, all-revert...

[KennethHoff]

how often do you use this? I suggest creating your own variant to start with.

[eliabexp]

I think that's not only about how often someone uses it, but to make tailwind cover more functions of CSS, there is a lot of classes in tailwind that's rarely used, nonetheless, they exist to make tailwind more and more complete