fix: add wayland dev headers and scanner for pywayland build on NixOS

configs/hypr/scripts/launch_first_available.sh

@@ -0,0 +1,8 @@
+#!/usr/bin/env bash
+# Launch the first available application from a list
+for cmd in "$@"; do
+    eval "command -v ${cmd%% *}" >/dev/null 2>&1 || continue
+    eval "$cmd" &
+    exit
+done
+exit 1