🧮 Math in token value enhancements

Today we can use math to create some very sophisticated token setups, but there are some limitations the community would like to have addressed:

Referencing Tokens in our math equations that have values that contain units can lead to unexpected results.

This is because the math package we use can resolve equations with units, as long as the units aren't mixed.
For example, if we have:
- a Token named size-2 with a value of 1.5rem
- a Token named density-default with a value of 2px
- When we include both Tokens in a math equation written as: {size-2} + {density-default}
- The equation can't be resolved because the Tokens we are referencing contain a mix of rem and pixel units.
If both Tokens have the same units, or are unitless, the equation would resolve as expected.

If a token has multiple values (spacing token with 4, 8), and it's used in a math equation, it breaks the function and it can't be resolved.

This means, any token with more than one value can't be referenced in tokens using math.

This forces token structure changes to workaround the limitation.

This issue isn't obvious to the person writing the token as there is a lack of specific error messages to help them self solve.

💬 Feedback that is valuable