feat: setup atuin server and desktop sync.

modules/cross-platform/home-manager/shell.nix

@@ -130,5 +130,17 @@
         program = "pinentry-gtk-2";
       };
     };
+
+    # Install and setup atuin
+    programs.atuin = {
+      enable = true;
+      daemon.enable = true;
+      enableZshIntegration = true;
+      settings = {
+        auto_sync = true;
+        sync_frequency = "5m";
+        sync_address = "https://atuin.cronyakatsuki.xyz";
+      };
+    };
   };
 }