hosts/tux: Add preliminary configuration for tux

Welcome to the team <3

flake.nix

@@ -11,6 +11,10 @@
         nixpkgs.follows = "nixpkgs";
       };
     };
+    aghpb = {
+      url = "github:cat-milk/Anime-Girls-Holding-Programming-Books";
+      flake = false;
+    };
     assets = {
       url = "path:./assets";
       flake = false;