Support `reshape`

[MasonProtter]

Currently, reshape(::StrideArray) gives a ReshapedArray. It'd be nice if we could do something similar to how view was handled.

[chriselrod]

It should probably only return another StrideArray if the original array was dense and column major.

[MasonProtter]

My usecase is that I want to make a large statically sized vector, then take a small dynamic view of that vector then reshape it to a matrix.

[chriselrod]

You're welcome to make a PR! But for that particular use case, you could also use ManualMemory.MemoryBuffer directly.

Another PR idea is to support that case directly, e.g. add support for providing a promise that the array is smaller than a given size, and then constructing a MemoryBuffer of the provided size.

[MasonProtter]

Nice, sounds good