`Zip` component

[emil14]

Fixed (2 inputs)

type ZipResult<T, Y> {
  first T 
  second Y
}

pub component Zip<T, Y>(first stream<T>, second stream<Y>) (res stream<ZipResult<T, Y>>)

Upsides

• type-safe
• easy to use

Downsides

• support only 2 streams

Variadic (N inputs)

pub component Zip<T>([streams] stream<T>) (res stream<T>)

Upsides

• supports N (up to 255) streams

Downsides

• might be a bit harder to use (questionable, less generics)
• stream items must be of the same type (can't e.g. merge int with string, etc)

A Note On Stream Size

We have to decide how to handle streams of different length (size)

I suggest follow how Python does it - finish when first stream is ended. Elements of other stream(s) are simply immited (TODO check if that's true, is Python really like this?)

[Catya3]

Seems like Python would take the shorter of the two

>>> x=[1,2,3,4]
>>> y=[1,2,3]
>>> list(zip(x,y))
[(1, 1), (2, 2), (3, 3)]

[emil14]

Done by @Catya3