Add hyprlock

wm/hyprland.nix

@@ -5,6 +5,7 @@
     rofi
     bzmenu
     hyprshot
+    hyprlock
   ];
 
   wayland.windowManager.hyprland = {
@@ -78,6 +79,7 @@
         "$mod, Q, killactive"
         "$mod, F, fullscreen"
         "$mod, M, exit"
+        "$mod, L, exec, hyprlock"
 
         # Focus
         "$mod, LEFT,  movefocus, l"