Tidal 3D Firmware

[mbooth101]

This PR contains two changes:

• Update the micropython snapshot to one that includes modframebuf enhancements that allow fast native drawing of polygons, ellipses and arcs to the off-screen frame buffer
• Add a module that provides fast native vector, matrix and quaternion maths functions

Together these changes allow real-time 3D rendering on the Tidal badge, as seen in the Tidal3D app from the hatchery that currently requires a custom firmware build: https://2022.badge.emfcamp.org/projects/tidal_3d

[Jonty]

😍 Merrrrge

[mbooth101]

FWIW I really wanted to use micropython's facility to use dynamic native modules to provide the 3D maths functions as part of my application (instead of baking them into the firmware) but there two problems with it:

• You can't use floating point arithmetic in dynamic nat-mods because the linker doesn't know how to provide the software float routines. It's possible to work around this by providing your own implementation of the missing functions such as __divsf3() function, e.g. by ripping them off from the Espressif toolchain source, but what a pain in the arse and even if you do this....
• The firmware seems to crash when I try to call a function in a dynamic nat-mod after a garbage collection has run. My guess is some reference to the native functions are erroneously cleaned up, but to be honest it's beyond my ability to debug and I wasn't able to completely eliminate allocations from my application (in an effort to avoid GC runs entirely)