added must have

pages/Useful Utilities/Must-have.md

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+
+This page documents software that is critical / very important to have running for a smooth
+Wayland / Hyprland experience.
+
+DEs like KDE / Gnome will do this automatically, Hyprland will not (because you might want to use something else)
+
+### A notification daemon
+_Starting method:_ most likely manual (`exec-once`)
+
+Many apps (e.g. Discord) may freeze without one running.
+
+Use e.g. `dunst`, `mako`, etc.
+
+### Pipewire
+_Starting method:_ automatic
+
+Pipewire is not necessairly required, but screensharing will not work
+without it.
+
+Install `pipewire` and `wireplumber` (**not** `pipewire-media-session`)
+
+### XDG Desktop Portal
+_Starting method:_ Automatic on Systemd, manual otherwise
+
+XDG Desktop Portal handles a lot of stuff for your desktop, like file pickers,
+screensharing, etc.
+
+See [The Hyprland Desktop Portal Page](../Hyprland-desktop-portal)
+
+### Authentication Agent
+_Starting method:_ manual (`exec-once`)
+
+Authentication agents are the things that pop up a window asking you for a password whenever
+an app wants to elevate its privileges.
+
+Our recommendation is the KDE one. For arch, it's `polkit-kde-agent`.
+
+You can autostart it with `exec-once=/usr/lib/polkit-kde-authentification-agent-1`.