Allow constructing IVec2 in graph

[0HyperCube]

The artboard node takes an IVec2 as the dimensions and position. Currently it is impossible to construct this in the graph.

A node taking in two f64s and constructing an IVec2 should be added.

[Keavon]

We should consider reusing the Vector2 node and letting the type system support casting from an IVec2 to a DVec2.

[aybdee]

I want to try doing this to get a better understanding of how graphene works, how do you suggest i go about it ?

[Keavon]

@TrueDoctor is this okay to work on right now or should it wait until your refactor in #1942 is done?

[TrueDoctor]

Should be fine to do now, will probably become obsolete when we add automatic type conversions

[Keavon]

In that case, @aybdee, you can just reference any of the value nodes. But if you want to wait like a week, the process of creating nodes will become much easier with that refactor mentioned above.

[aybdee]

i think i'd wait then
i'll try some other stuff for now

[Keavon]

Sounds great. There are a lot of good options in #code-todo-list on Discord, that's where most of the good beginner issues are at.