go-swapMaxMin

The Maxxie and Minnie exercise

Given an input number, find the largest and smallest number that can be found after a single swap from the starting number.

For example:
With input 213
Max value with only 1 swap = 312
Min value with only 1 swap = 123

Inspired by https://jcarroll.com.au/2024/10/26/polyglot-maxxie-and-minnie/