Update: Change f_memory_array_increase() and f_memory_array_increase_by() design.

Update: Change f_memory_array_increase() and f_memory_array_increase_by() design.

Don't bother setting the *used size to F_number_t_size_unsigned_d on large size.
Instead, just return an error of F_array_too_large.

Add an unsigned overflow check such that if the increment results in an overflow, then the resulting length will be smaller than the original length.

Update the documentation comments.