Type time validation of variable expressions

[Gobot1234]

📝 Description of the feature

Currently reals are typed as str | float. Initially when reading that I thought it might be a bug but I later remembered the existence of the constants you can enter.

I think the ideal solution from a typing perspective is to have a callback scope that produces the expression though I think that'd be very challenging to implement especially with all the binops and whatnot you'd need to support

💡 Steps for implementing the feature

I would imagine a lot of this needs autogenerating based on the version which will make things very challenging.

🔗 Useful links and references

No response