Semantic spacing token

**Is your feature request related to a problem? Please describe.**

We have spacing tokens defined https://compound.element.io/?path=/docs/tokens-spacing--docs

They are all a multiplier of the `cpdSpace1x` token. Meaning that changing the base spacing will change the whole spacing.
This is very interesting to implement a compact mode in the timeline for example

Compact mode is mostly about vertical density in our context. With the current spacing setup, we have no way of overriding the spacing on a defined axis

**Describe the solution you'd like**

Two spacing scales, for the `X` and `Y` axis?

**Describe alternatives you've considered**

I don't know

**Additional context**

n/a, but would been keen to read @janogarcia thoughts