phone: Prepare configuration for main flake

This is part of merging the phone flake with the main nix-config flake.

hardware/phone.nix

@@ -1,5 +1,4 @@
-# NOTE: this file was generated by the Mobile NixOS installer.
-{ config, lib, pkgs, ... }:
+{ lib, ... }:
 
 {
   fileSystems = {

phone.nix

@@ -0,0 +1,23 @@
+{ self, pkgs, ... }:
+
+let
+  inherit (builtins) attrValues;
+in
+{
+  imports = attrValues self.nixosModules;
+  nixpkgs.overlays = attrValues self.overlays;
+  home-manager.sharedModules = attrValues self.homeManagerModules;
+  environment.systemPackages = attrValues self.packages.${pkgs.system};
+
+  modules = {
+    system = {
+      mullvad = true;
+      hostName = "mobile-nixos";
+      stateVersion = "23.11";
+    };
+
+    desktop = {
+      phone = true;
+    };
+  };
+}

phone/configuration.nix

@@ -1,75 +0,0 @@
-{ pkgs, ... }:
-
-{
-  environment.systemPackages = with pkgs; [
-    neovim
-    fish
-    yazi
-    bat
-    w3m
-    librewolf
-    git
-    htop
-    gnupg
-    mpv
-    ncmpcpp
-    pqiv
-    qutebrowser
-    starship
-    eza
-    fd
-    fzf
-    ripgrep
-    yt-dlp
-    neofetch
-    genact
-    zellij
-    p7zip
-    unar
-  ];
-
-  programs.fish.enable = true;
-  programs.neovim.enable = true;
-  users.defaultUserShell = pkgs.fish;
-  environment.shells = [ pkgs.fish ];
-
-  networking = {
-    hostName = "mobile-nixos";
-    wireless.enable = false;
-    networkmanager.enable = true;
-  };
-
-  hardware = {
-    pulseaudio = {
-      enable = true;
-      package = pkgs.pulseaudioFull;
-    };
-
-    bluetooth.enable = true;
-  };
-
-  powerManagement.enable = true;
-
-  zramSwap.enable = true;
-
-  nix.settings.experimental-features = [ "nix-command" "flakes" "repl-flake" ];
-
-  services.xserver.desktopManager.phosh = {
-    user = "user";
-  };
-
-  users.users."user" = {
-    isNormalUser = true;
-    description = "User";
-    password = "user";
-    extraGroups = [
-      "dialout"
-      "feedbackd"
-      "networkmanager"
-      "video"
-      "wheel"
-    ];
-  };
-
-  system.stateVersion = "23.11";
-}