Printf utils

The mwx library uses an implementation of printf, which is commonly used in C, for formatting output. Function definitions for several functions are available.

int mwx_printf(const char* format, ...)
int mwx_snprintf(char* buffer, size_t count, const char* format, ...)

mwx_printf() prints a printf output to the Serial object. It is the same process as Serial.printfmt().

mwx_snprintf()` prints a snprintf to a buffer.