The current implementation of open requires the user to pass all three
args to the function. It should use a va_list and allow a user to
provide only the filename and flags.

Finish ctype impls

Create crate and stubs for wctype

Create the wctype crate and stub functions with the unimplemented macro.

Add ctype functions and atoi/atol

Add ctype functions
  - isalnum
  - isalpha
  - isascii
  - isdigit
  - islower
  - isspace
  - isupper
Add stdlib functions
  - atoi
  - atol
Fix some warnings
Make a fmt run

add test for errno

Implement several more string functions and add errno