feat: add nix configs for host neon with wayland, niri and nocitalia-shell

hosts/neon/noctalia.nix

@@ -0,0 +1,7 @@
+{ pkgs, inputs, ... }:
+{
+  # install noctalia package
+  environment.systemPackages = with pkgs; [
+    inputs.noctalia.packages.${pkgs.stdenv.hostPlatform.system}.default
+  ];
+}