Add implicit cast from Vector3 to vector in the type solver

[sangoderango]

Not sure if this is the right place to put this but currently the vector library is practically useless in Roblox with strict since you get a type error when using a Vector3 as an input. In Roblox they are pretty much the same type so pls add implicit cast. Type coercion doesn't work also

[Finchasaurus]

I feel like this would be better as a Devforum feature request since it's more of a Roblox API issue rather than a Luau issue