Feature (hypr): add “Pop window” (float+pin) on SUPER+O (#2954)

* Feature (hypr): add “Pop window” (float+pin) on SUPER+L

* fix: changed default keybinding to SUPER+O

default/hypr/apps/system.conf

@@ -12,3 +12,6 @@ windowrule = fullscreen, class:Screensaver
 
 # No transparency on media windows
 windowrule = opacity 1 1, class:^(zoom|vlc|mpv|org.kde.kdenlive|com.obsproject.Studio|com.github.PintaProject.Pinta|imv|org.gnome.NautilusPreviewer)$
+
+# Popped window rounding
+windowrule = rounding 16, tag:pop