[C++][Python] Show how to cast everything

Arrays, chunked arrays, record batches, and tables

AFAIK in C++, there's no easy method for casting a table so we should demonstrate that

The issue requests casting examples for arrays, chunked arrays, record batches, and tables in C++ and Python, but names no files or tests. Start by locating the cookbook sections for these structures and reviewing their existing examples. Done means the requested casting approaches are demonstrated clearly for each listed type and language.

Written by the indexing model from the issue text.