feat(ostree-images): import river template files from wayblue

ostree-images/river/files/system/hyprland/usr/bin/starthyprland

@@ -0,0 +1,16 @@
+#!/usr/bin/env bash
+
+# Tell this script to exit if there are any errors.
+# You should have this in every custom script, to ensure that your completed
+# builds actually ran successfully without any errors!
+set -oue pipefail
+
+
+hyprland_conf="$HOME/.config/hypr/hyprland.conf"
+default_conf="/usr/share/hyprland/hyprland.conf"
+
+if [ -f "$hyprland_conf" ]; then
+    Hyprland -c "$hyprland_conf"
+else
+    Hyprland -c "$default_conf"
+fi