Rapidhash Unity port

Ten years ago I was writing about various non-cryptographic hash functions. Back then xxHash was new (introduced in 2014)! However, quite some things have changed since then. xxHash itself got a new &ldquo;XXH3&rdquo; version (2020); &ldquo;wyhash&rdquo; appeared (2020+), and eventually evolved into &ldquo;rapidhash&rdquo; (2024+). Many others too, but this is about rapidhash.&#xA;It is small and…