manatee: Add self-hosted atuin sync server

hosts/manatee/modules/atuin/default.nix

@@ -0,0 +1,23 @@
+{ lib, config, ... }:
+let
+  enabled = config.mod.atuin.enable;
+  port = 8889;
+in
+{
+  options = {
+    mod.atuin = {
+      enable = lib.mkEnableOption "Enable atuin module";
+    };
+  };
+
+  config = lib.mkIf enabled {
+    services.atuin = {
+      enable = true;
+      host = "0.0.0.0";
+      inherit port;
+      openFirewall = true;
+      openRegistration = true;
+      database.createLocally = true;
+    };
+  };
+}