Add css functions to data types

[RobinMalfait]

This PR adds min, max and clamp as css functions to data types.
This allows us to also write more "modern" arbitrary values, e.g.:

<div class="text-[min(10vh,100px)]"></div>

Which results in:

.text-\[min\(10vh\2c 100px\)\] {
  font-size: min(10vh, 100px);
}

Before this PR, this code wouldn't even be generated, if you wanted this to be generated then you had to force the length: data type for example:

<div class="text-[length:min(10vh,100px)]"></div>