Installed startship, themed kitty, moved some configs to shell.nix, stylix for theming

flake.nix

@@ -11,10 +11,11 @@
       url = "github:nix-community/nixvim";
       inputs.nixpkgs.follows = "nixpkgs";
     };
+    stylix.url = "github:danth/stylix";
   };
 
   outputs =
-    inputs@{ nixpkgs, home-manager, ... }:
+    inputs@{ nixpkgs, home-manager, stylix, ... }:
     let
       system = "x86_64-linux";
     in
@@ -33,6 +34,7 @@
             home-manager.extraSpecialArgs = { inherit inputs; };
             home-manager.users.martin = import ./home.nix;
           }
+	  stylix.nixosModules.stylix
         ];
       };
     };