Actually remove stdlib from stdio. This should have been done with wchar being put in, but I messed something up

Apparently a root-level cfg does not go well with a root-level no_std

Changed FILE to use a vector as a buffer instead of raw pointers. This allows us to remove the large majority of unsafe blocks from the code

Changed FILE to use a vector as a buffer instead of raw pointers. This allows us to remove the large majority of unsafe blocks from the code

Changed FILE to use a vector as a buffer instead of raw pointers. This allows us to remove the large majority of unsafe blocks from the code