WIP: Add with_max builder, basic PermutedSlice impl, adjusted algo

[hoxxep]

Unfinished implementation for PermuteSlice trait and introduces the with_max builder setting to allow using RandomSequence for generating slice permutations.

TODO:

• Improve the algorithm and/or seed with a hash to increase the number of permutations we're able to produce. With the lack of a seeded offset this algo only generates a very small number of permutations versus the total available permutations.
• Revisit PermuteSlice implementation for a cleaner API and iterators, double check the behaviour/need for permute_mut.
• Add permute-in-place for slice mut.