C23 support: Add `stdckdint.h`

[ehaas]

See section 7.20 https://www.open-std.org/jtc1/sc22/wg14/www/docs/n3047.pdf

We can probably just make these macros which expand to the corresponding __builtin_OP_overflow builtins e.g. https://gcc.gnu.org/onlinedocs/gcc/Integer-Overflow-Builtins.html#index-_005f_005fbuiltin_005fadd_005foverflow