Add placeholders for locking, suspend, hibernate

nixos-config/home-manager/config/hypr/hyprland.conf

@@ -131,14 +131,18 @@ bind = ALT_$mod, L, exit,
 bind = $mod, x, submap, | (S)hutdown, (R)eboot, (E)xit |
 # power management submap
 submap = | (S)hutdown, (R)eboot, (E)xit |
-    # logout
-    bind = , e, exit,
     # lock
     # TODO
+    # logout
+    bind = , e, exit,
     # poweroff
     bind = , s, exec, systemctl poweroff
     # reboot
     bind = , r, exec, systemctl reboot
+    # suspend
+    # TODO
+    # hibernate
+    # TODO
 
     # use reset to go back to the global submap
     bind=,escape,submap,reset