Feat/bit next higher same ones

[0xPrashanthSec]

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Name: Next higher integer with the same number of set bits (SNOOB).
author: @0xPrashanthSec

Given a non-negative integer n, return the next higher integer that has the same
number of 1 bits in its binary representation. If no such number exists within
Python's unbounded int range (practically always exists unless n is 0 or all
ones packed at the most significant end for fixed-width), this implementation
returns -1.

This is the classic SNOOB algorithm from "Hacker's Delight".

Reference:

• Next bit permutation (SNOOB): https://graphics.stanford.edu/~seander/bithacks.html#NextBitPermutation

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• pytest

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