Mandelbrot viewer

[paul]

@mmoskal

There is currently no way to use the FPU.

Well, no easy way

Meowbit hardware floating point support, or "how I spent an entire weekend adding two numbers together"

So, the first thing I did upon discovering Makecode Arcade, was to throw together this Mandelbrot hack, just for fun: @frank_schmidt kindly ran it on real hardware (I did not have a Meowbit at the time - I now do!), and the result was that it was so slow that it was effectively unusable since Arcade is configured to always have Typescript use double-precision software-emulated floating point. @peli pointed out that there is a fixed-point library, declaring the Fx8 type, which makes real-numbe…