Containers: Error required for list of array

[EmilyBourne]

Describe the bug

Containers such as lists and sets need to ensure that each element respects the homogeneity conditions. Each element should have the same:

• datatype
• precision
• rank
• order
• class type

However there is currently no way to determine the order of an element of a container. The type mechanism should be improved to handle this.

But in the meantime an error should be raised to prevent the user from creating lists of multi-dimensional arrays (2D or more) as we would not know how to index an element of such a list.

To Reproduce

Provide code to reproduce the behaviour:

a = [np.ones((3,4))]
a.append(np.ones((5,6), order='F'))

a : 'float[:,:]' = []
a.append(np.ones((5,6), order='F'))

[EmilyBourne]

cc: @Farouk-Echaref