Extract nano settings into a shared modules

hosts/astral/default.nix

@@ -1,6 +1,7 @@
 { nixosModules, modulesPath, lib, pkgs, ... }: {
   imports = [
     "${modulesPath}/virtualisation/amazon-image.nix"
+    nixosModules.nano
     nixosModules.nettika
     nixosModules.promptmoji
   ];
@@ -26,8 +27,6 @@
 
   security.sudo.wheelNeedsPassword = false;
 
-  environment.variables.EDITOR = "nano";
-
   services.caddy = {
     enable = true;
     virtualHosts = {
@@ -53,14 +52,6 @@
     };
   };
 
-  programs.nano = {
-    enable = true;
-    nanorc = ''
-      set autoindent
-      set linenumbers
-    '';
-  };
-
   documentation.man.generateCaches = false;
 
   promptSymbol = "✴️";