Use ArrayInterface.jl?

It might make handling conversion of arrays between Julia and Python easier - or at least provide a consistent interface to override to control the behaviour.

Start by reviewing the proposed use of ArrayInterface.jl and PythonCall.jl's existing Julia–Python array conversion behavior. Determine whether adopting or exposing a consistent override interface is feasible, and document a concrete design and scope before implementation.

索引モデルが issue の本文から書いたものです。