Switch from rulinalg to nalgebra

Nalgebra is more widely used, is much more functional and most
importantly provides stack-based types.
3 jobs for fast-srgb in 7 minutes and 43 seconds (queued for 6 minutes and 9 seconds)
latest
Status Job ID Name Coverage
  Test
passed #68793
fedora:test

00:07:20

 
  Lint
manual #68795
allowed to fail manual
clippy
passed #68794
rustfmt

00:00:23