enduserrr/libft ? reverse-engineered prompt

Build me a Libft project in C, like the basic function library used in 42 style school projects.

I want a clean reusable library with the usual memory, string, character check, conversion, and output helper functions, plus a couple of extras like get_next_line and a simple printf implementation. It should compile with a Makefile, support make, make clean, make fclean, and make re, and keep the code organized so it’s easy to reuse in later projects.

Please make sure the functions behave like their standard C counterparts where that makes sense, handle edge cases safely, and include the custom helpers listed in the README too. If anything is unclear, use the README as the source of truth and look up current docs online if you need to.