Rename keycode functions

[NicoHood]

I get lot of bug reports about people trying to use keycodes directly, but they are casting them wrong. The idea is to rename functions like inline size_t write(KeyboardKeycode k) to inline size_t writeKeycode(KeyboardKeycode k).
https://github.com/NicoHood/HID/blob/master/src/HID-APIs/KeyboardAPI.h#L38-L44

We could deprecate the old functions to start a smooth transition. What do you think?

CC @SukkoPera

[SukkoPera]

(I'm currently thinking on this matter, will get back to you ASAP.)