Learning project on a STM32H7S78-DK

Long-term goal is to write a UF2 bootloader and maybe a keyboard firmware on top to learn low-level stuff and, specially, zig.

File structure

modules - Building blocks
- application - (TBD) So far, just a playground for random code ideas
- bootloader - (WIP) Implementation of UF2 bootloader, into the external OSPI flash
- common: crt0.c-like logic
  - Fill data regions and some other initial setup
  - Set up zig's logging and panic
  - Call into main
- hal - STM's vendor HAL + some zig wrappers
ld - Linker scripts