Export Table and View with aliasing to discourage instantiation

[timkpaine]

#2754 remove the top level Table and View as they are not constructible. However, libraries like pydantic and csp like to have types for type validation, so here we reintroduce them but alias them to types to discourage direct instantiation.

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[timkpaine]

going to do pyarrow.Table style with a nice exception for the constructors, then move to perspective.types.