Add anime-launcher, remove commented code in flake

Add anime-launcher because it needs to be installed at the system level
to interact with /etc/hosts configuration.

Remove commented code as it wasn't being used to overlay packages, and
can be easily researched later

modules/etc/anime-launcher/default.nix

@@ -0,0 +1,8 @@
+{ inputs, pkgs, lib, ... }:
+
+{
+  imports =  [ inputs.aagl.nixosModules.default ];
+  nix.settings = aagl.nixConfig;
+
+  programs.honkers-railway-launcher.enable = true;
+}