added: steam floating fix for hyprland

home/hypr/hyprland/rules.nix

@@ -17,5 +17,8 @@
       "keep_aspect_ratio on, match:title ^([Pp]icture[-\\s]?[Ii]n[-\\s]?[Pp]icture)(.*)$"
       "immediate on,         match:class ^(steam_app).*"
     ];
+    windowrulev2 = [
+      "float, class:^(steam)$, title:^(?!Steam$).*"
+    ];
   };
-}
+}