Remove micromath dependency, improve primitive drawing speed by 300x,

add mouse support and interrupts on x86_64 using a ps2 mouse which
needed pic unmasking, add span filling to framebuffer, add back
without_interrupts to serial console and framebuffer, add a mouse
rectangle which tracks the mouse position and test the performance of
the drawing.

kernel/src/driver/mod.rs

@@ -1,4 +1,5 @@
 pub mod graphics;
 pub mod keyboard;
+pub mod mouse;
 pub mod serial;
 pub mod timer;