feat(hypr): ghostty as default terminal

.config/hypr/configs/default_apps.conf

@@ -12,7 +12,7 @@ $notifications-menu-reload = $notifications-menu -R && $notifications-menu -rs
 
 $browser = zen-browser
 $notetaking-app = obsidian
-$terminal = kitty
+$terminal = ghostty --gtk-single-instance=true
 $office-suite = libreoffice
 $editor = $terminal nvim
 $alter-editor = vscodium