Refactor: fll_error_print_t is now fl_print_t.

Refactor: fll_error_print_t is now fl_print_t.

After using fll_error_print_t for a while now, I find that it is in practice superior to the regular print approach (such as with "f_file_t output;").
This made coding far easier than I imagined.

This refactor changes renames this from an error purpose print to a generic all-purpose print.
The existing "f_file_t output;" designs are not changed with this factor and will be changed in a later commit.

This refactor allows this to be moved from a level 2 project to a level 1 project.

In following with my completeness principle, I have added a "suffix" to compliment the "prefix".

I also added the "set" as a pointer to make it optional and to also not take up as much resources the full object rather than a pointer.
Having used fll_error_print_t for some time, I have found that I occasionally needed more than just the "context" and "notable".

While working on this, I realized I could improve my practice of handling "static" strings (such as fll_error_print_debug_s).
The practice is now to have the defines more closely match the names, but begin with the F_, FL_, etc.. in the same way that status codes are used.
This then allows:
|           old           |       new        |
----------------------------------------------
| fll_error_print_debug_s | fl_print_debug_s | <--- variable.
| fll_error_print_debug   | FL_print_debug_s | <--- define/macro.

A future commit will convert all existing code that follows the old way.