nix-darwin: make several changes to home and system configuration specific to darwin platform

hosts/shared/darwin.nix

@@ -23,12 +23,32 @@
       };
     };
 
-    settings.experimental-features = "nix-command flakes";
+    settings = {
+      experimental-features = [
+        "nix-command"
+        "flakes"
+      ];
+
+      use-xdg-base-directories = true;
+    };
   };
 
   # Enables Touch ID for sudo prompts.
   security.pam.services.sudo_local.touchIdAuth = true;
 
+  programs = {
+    zsh = {
+      enable = true;
+      enableCompletion = true;
+      enableAutosuggestions = true;
+      enableSyntaxHighlighting = true;
+
+      interactiveShellInit = ''
+        eval "$(jump shell)"
+      '';
+    };
+  };
+
   environment = {
     variables = rec {
       XDG_CACHE_HOME = "$HOME/.cache";
@@ -43,13 +63,14 @@
       ls = "ls --color=tty";
       ff = "clear;fastfetch";
       nb = "nix-build";
-      nix-rebuild = "sudo darwin-rebuild switch";
     };
 
     systemPackages = with pkgs; [
       wget
       fastfetch
       btop
+      nerd-fonts.hack
+      jump
     ];
   };