Made battery alert and a option for rotating screen on HDMI and VGA

In battery.lua, it was created a function that makes a box spawn in the down right corner of the screen when battery percent is 10% or lower. It's also another function that makes the box stops spawning when a charger is connected to the laptop.

In menu.lua, I added two choices, one for HDMI and one for VGA, so that it's a menu that makes it possible to rotate the screen connected to one of these outputs.