home: atuin: add daemon

Enabled by default, I probably won't have a reason *not* to use it.

modules/home/atuin/default.nix

@@ -8,6 +8,10 @@ in
 
     # I want the full experience by default
     package = mkPackageOption pkgs "atuin" { };
+
+    daemon = {
+      enable = my.mkDisableOption "atuin daemon";
+    };
   };
 
   config = lib.mkIf cfg.enable {
@@ -15,6 +19,10 @@ in
       enable = true;
       inherit (cfg) package;
 
+      daemon = lib.mkIf cfg.daemon.enable {
+        enable = true;
+      };
+
       flags = [
         # I *despise* this hijacking of the up key, even though I use Ctrl-p
         "--disable-up-arrow"