Refactor: Change FILE * to f_file_t when printing.

Refactor: Change FILE * to f_file_t when printing.

Due to the by-design restrictions, the f_file_t cannot be defined in f_file project and be used in another level_0 project.
The f_print project cannot depend on f_file project and cannot use f_file_t.

I spent some time considering this problem.

The f_type project is a special case core project that othe level_0 projects can depend on it.
This project also provides types and f_file_t is a type.

Move f_file_t's definition into f_file project.
I want to avoid always pulling in file related headers.
The the f_file_t is defined in a separate file "type_file.h".
The "type_file.h" must be manually included when needed.

With type_file.h in place, the print projects all include "type_file.h" and utilize f_file_t.
The "FILE *" stream is now replaced wth f_file_t.

This simplifies the code, makes it easier to use, and makes it easier to maintain.
For example, "fll_print_dynamic_raw(f_string_eol_s, main->output.to.stream);" can not be "fll_print_dynamic_raw(f_string_eol_s, main->output.to);".

I made this decision in the middle of a "Progress" change process.
There may be code missed and tests may need to be updated at some point after the "Progress" change process is complete.