[Iterators] add `.rolling` option

[github-actions[bot]]

[Iterators] add .rolling option

this would allow us to have a rolling window of values

for example, if we have a list of 10 values, and we want to

iterate over it with a window of 3 values, we would get:

[1,2,3], [2,3,4], [3,4,5], [4,5,6], [5,6,7], [6,7,8], [7,8,9], [8,9,10]

https://github.com/arturo-lang/arturo/blob/ed0410b81b479dcf090b239e2193a45ecf65cd5d/src/library/Iterators.nim#L12

## (part of the standard library)

# TODO(Iterators) add `.rolling` option
#  this would allow us to have a rolling window of values
#  for example, if we have a list of 10 values, and we want to
#  iterate over it with a window of 3 values, we would get:
#  `[1,2,3], [2,3,4], [3,4,5], [4,5,6], [5,6,7], [6,7,8], [7,8,9], [8,9,10]`
#  labels: library, enhancement

#=======================================
# Pragmas
#=======================================
ndex 403bef8a72..a0aa11d4c2 100644
++ b/src/library/Numbers.nim

ee6fca73fa4f70e752f77f0c2e09c36f7ee6e9ec

[stale[bot]]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[stale[bot]]

Closing issue as stale.

[Eloitor]

I propose .offset: instead. By default .offset: is the same as the size of the window. Setting .offset: to 1 we would get the behavior of the .rolling option defined here.

.offset: is more flexible.