This PR adds a new hash method to the Illuminate\Support\Stringable class to simplify fluent string hashing and improve DX.

Why?

Currently, hashing with algorithms like xxh3 (which doesn't have a dedicated hash function) within a fluent chain can be verbose using pipe():

$appId = str('secret-unique-key')
    ->pipe(fn(Stringable $str) => hash('xxh3', (string) $str))
    ->limit(10)
    ->prepend('app-');

This new hash() method provides a more direct and readable alternative:

$appId = str('secret-unique-key')
    ->hash('xxh3')
    ->limit(10)
    ->prepend('app-');