Use framebuffer line to improve performance

[follower46]

Currently updates to the frame buffer pain the pixels individually even though the painting can be expressed by a single line.

We should make a single line call with the two coordinates reducing updates and improving performance.

https://docs.micropython.org/en/latest/library/framebuf.html#framebuf.FrameBuffer.line

[follower46]

I'm not 100% sure that Bresenham's line algorithm will be more performant, but it's easy enough to test.
https://github.com/adafruit/micropython-adafruit-framebuf/blob/master/framebuf.py#L110