Add in quickshell and prepare hyprpanel for deprecation (#49)

Reviewed-on: #49
Co-authored-by: Eriq Taing <eriq12@protonmail.com>
Co-committed-by: Eriq Taing <eriq12@protonmail.com>

files/systemd/user/quickshell.service

@@ -0,0 +1,18 @@
+[Unit]
+Description=A panel bar branched from AGS maintained by Hyprland devs.
+# order startup after WM
+After=graphical-session.target
+
+[Service]
+Type=exec
+# Repurpose XDG Autostart filtering
+ExecCondition=/lib/systemd/systemd-xdg-autostart-condition "wlroots:sway:Wayfire:labwc:Hyprland" ""
+ExecStart=/usr/bin/quickshell
+Restart=on-failure
+Slice=app-graphical.slice
+
+[Install]
+WantedBy=graphical-session.target
+# Alternatively can be wanted by specific WMs' targets
+# Should also be duplicated in 'After=' to avoid ordering loop
+#WantedBy=wayland-session@hyprland.desktop.target