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MINOR: [Python][Docs] Add examples for `MapArray.from_arrays` (#37656)



### Rationale for this change
This PR enriched the `MapArray.from_arrays` with some nice examples. The examples are from the real-world scenario of working with survey data (scaled down, of course).

### What changes are included in this PR?
The only change that this PR presents is to the docstring of the `MapArray.from_arrays` function.

### Are these changes tested?
Does not apply

### Are there any user-facing changes?
Yes, the docstring of the `MapArray.from_arrays` function.

Lead-authored-by: Slobodan Ilic <slobodan.a.ilic@gmail.com>
Co-authored-by: Slobodan Ilic <slobodan@crunch.io>
Co-authored-by: Alenka Frim <AlenkaF@users.noreply.github.com>
Co-authored-by: Dane Pitkin <48041712+danepitkin@users.noreply.github.com>
Signed-off-by: AlenkaF <frim.alenka@gmail.com>