[Second review] SE-0453: Vector, a fixed size array

[mtsrodrigues (Mateus Rodrigues)]

@JuneBash

What about FixedSizeArray? I know it's a little more verbose, but it is in keeping with the tradition of lower-level types tending to be more verbose

I like FixedSizeArray. WGSL, for example, distinguishes between fixed-size arrays (array<T,N>) and runtime-sized arrays (array<T>).