Move common NixOS configuration to another module

hosts/totsugeki/nixos.nix

@@ -15,7 +15,7 @@
     "/" = {
       device = "/dev/disk/by-uuid/144857c7-877b-46c7-94d9-30a6d6d27cf0";
       fsType = "btrfs";
-      options = [ "compress=zstd:9" ];
+      options = [ "compress=zstd:15" ];
     };
 
     "/boot" = {
@@ -26,13 +26,13 @@
     "/home" = {
       device = "/dev/disk/by-uuid/4bbd6139-7caa-4617-a94f-b185c5f6ca45";
       fsType = "btrfs";
-      options = [ "compress=zstd:9" ];
+      options = [ "compress=zstd:15" ];
     };
 
     "/mnt/Datos" = {
       device = "/dev/disk/by-uuid/994ef2bd-a9fb-4414-9a0a-19b150ffa452";
       fsType = "btrfs";
-      options = [ "compress=zstd:9" "user" "x-systemd.automount" "exec" ];
+      options = [ "compress=zstd:15" "user" "x-systemd.automount" "exec" ];
     };
   };
 
@@ -47,40 +47,11 @@
     useDHCP = lib.mkDefault true;
   };
 
-  nix.settings.experimental-features = [ "nix-command" "flakes" ];
-
   time.timeZone = "Europe/Madrid";
 
   i18n.defaultLocale = "es_ES.UTF-8";
-  console = {
-    keyMap = lib.mkForce "dvorak-es";
-    useXkbConfig = true;
-  };
 
-  hardware = {
-    enableRedistributableFirmware = true;
-    cpu.amd.updateMicrocode =
-      lib.mkDefault config.hardware.enableRedistributableFirmware;
-  };
-
-  nixpkgs = {
-    config.allowUnfree = true;
-    hostPlatform = lib.mkDefault "x86_64-linux";
-  };
-
-  users = {
-    defaultUserShell = pkgs.zsh;
-    extraGroups.vboxusers.members = [ "avery" ];
-    users.avery = {
-      extraGroups = [ "wheel" ];
-      isNormalUser = true;
-    };
-  };
-
-  environment = {
-    shells = with pkgs; [ zsh ];
-    systemPackages = with pkgs; [ htop libjxl neovim ];
-  };
+  nixpkgs.config.allowUnfree = true;
 
   fonts = {
     packages = with pkgs; [
@@ -97,30 +68,11 @@
     };
   };
 
-  programs = {
-    hyprland.enable = true;
-    steam.enable = true;
-    zsh.enable = true;
-  };
-
   xdg.portal = {
     enable = true;
     extraPortals = with pkgs; [ xdg-desktop-portal-gtk ];
   };
 
-  security = {
-    doas = {
-      enable = true;
-      extraRules = [{
-        users = [ "avery" ];
-        keepEnv = true;
-        persist = true;
-      }];
-    };
-    rtkit.enable = true;
-    sudo.enable = false;
-  };
-
   services = {
     greetd = {
       enable = true;
@@ -140,7 +92,6 @@
       };
       pulse.enable = true;
     };
-    openssh.enable = true;
     udisks2.enable = true;
   };