ft_printf:

Approach: A recursive descent parser to convert formatting strings into an array of formatting specifiers, which are then reduced into a single output string

Bonuses: 1: * for width/prec 2: ability to register custom conversion functions, and swap out the default conversion specifiers (see ftprintf_register_cnv) 3: partial linking -> only the functions listed in srcs/exported.sym are exported by the linker, all others are not