[EPIC] Multi-dimensional, heterogeneous data container  #2474

Is this a duplicate?

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Area

libcu++

Is your feature request related to a problem? Please describe.

mdspan greatly simplifies working with multi-dimensional tensors. On the other hand, mdspan requires that pre-allocated memory and acts as a view on top of it.

Describe the solution you'd like

Provide <mdarray>

Describe alternatives you've considered

No response

Additional context

No response