flake-list: add chaotic nyx flake

[JohnRTitor]

Nix flake for bleeding-edge and unreleased packages (e.g., mesa_git, telegram_git) Additonally it provides cachyos linux kernel.

@dasJ @Mic92 friendly ping

[PedroHLC]

Note: I wonder if CI from this repo will work in this flake, since it uses https://github.com/NixOS/nix/pull/8892

[JohnRTitor]

Ah, it's a shame then.

[JohnRTitor]

Re-opened with the hope of adding this if flake schemas feature is added to nix, someday.