Move Marauder dev configs into a separate module

hosts/marauder/default.nix

@@ -9,6 +9,7 @@ in
     self.nixosModules.common
     self.nixosModules.prompt
     ./backup.nix
+    ./dev.nix
   ];
 
   networking.hostName = "marauder";
@@ -63,10 +64,6 @@ in
   };
 
   environment = {
-    variables = {
-      EDITOR = "nano";
-      VISUAL = "code --wait";
-    };
     systemPackages = [
       ffcheck
       inputs.shelvacu.packages.x86_64-linux.sm64coopdx
@@ -81,15 +78,6 @@ in
       firefox
       filezilla
 
-      # Coding
-      vscode
-      kotlin
-      rustup
-      pyenv
-      gcc
-      nixd
-      nixpkgs-fmt
-
       # Art and 3D
       inkscape
       gimp
@@ -112,10 +100,6 @@ in
     dedicatedServer.openFirewall = true;
   };
 
-  programs.direnv = {
-    enable = true;
-  };
-
   services.xserver = {
     enable = true;
     videoDrivers = [ "nvidia" ];