xremap: add missing client variants

pkgs/by-name/xr/xremap/package.nix

@@ -33,6 +33,21 @@ let
       features = [ "hypr" ];
       descriptionSuffix = "Hyprland";
     };
+    niri = {
+      suffix = "-niri";
+      features = [ "niri" ];
+      descriptionSuffix = "Niri";
+    };
+    cosmic = {
+      suffix = "-cosmic";
+      features = [ "cosmic" ];
+      descriptionSuffix = "Cosmic";
+    };
+    socket = {
+      suffix = "";
+      features = [ "socket" ];
+      descriptionSuffix = "Socket client";
+    };
   };
 
   variant = variants.${withVariant} or null;