Function nstd::string::nstd_string_from_existing

#[no_mangle]
pub unsafe extern "C" fn nstd_string_from_existing(
    bytes: &NSTDVec
) -> NSTDString

Creates an NSTDString from existing data. Parameters: const NSTDVec *const bytes - The existing raw data. Returns: NSTDString string - The new NSTDString object.