feat: redesign the project structure

modules/darwin/core.nix

@@ -1,5 +1,27 @@
 { pkgs, lib, ... }:
 {
+  # # enable flakes globally
+  nix.settings.experimental-features = [ "nix-command" "flakes" ];
+
+  # Auto upgrade nix package and the daemon service.
+  services.nix-daemon.enable = true;
+  # Use this instead of services.nix-daemon.enable if you
+  # don't wan't the daemon service to be managed for you.
+  # nix.useDaemon = true;
+
+  nix.package = pkgs.nix;
+
+  programs.nix-index.enable = true;
+
+  # Add ability to used TouchID for sudo authentication
+  security.pam.enableSudoTouchIdAuth = true;
+
+  # Keyboard
+  system.keyboard.enableKeyMapping = true;
+  system.keyboard.remapCapsLockToEscape = true;
+
+  # Set your time zone.
+  time.timeZone = "Asia/Shanghai";
 
   # Create /etc/zshrc that loads the nix-darwin environment.
   programs.zsh.enable = true;
@@ -8,9 +30,6 @@
   # `home-manager` currently has issues adding them to `~/Applications`
   # Issue: https://github.com/nix-community/home-manager/issues/1341
   environment.systemPackages = with pkgs; [
-    alacritty
-    jq
-    bat
   ];
 
   # Fonts