hyprland: Add performance script from wiki

hyprland/.config/hypr/gamemode.sh

@@ -0,0 +1,16 @@
+#!/usr/bin/env sh
+# NOTE: This script was taken from the Hyprland wiki
+# TODO: Integrate hyprctl commands into your own workflow.
+HYPRGAMEMODE=$(hyprctl getoption animations:enabled | sed -n '2p' | awk '{print $2}')
+if [ $HYPRGAMEMODE = 1 ] ; then
+    hyprctl --batch "\
+        keyword animations:enabled 0;\
+        keyword decoration:drop_shadow 0;\
+        keyword decoration:blur 0;\
+        keyword general:gaps_in 0;\
+        keyword general:gaps_out 0;\
+        keyword general:border_size 1;\
+        keyword decoration:rounding 0"
+    exit
+fi
+hyprctl reload