Progress: Continue mass converting to f_string_static_t.

Progress: Continue mass converting to f_string_static_t.

I've noticed several things that need cleaning and improvement, such as:
- I should make an f_string_dynamic_partial_rip() and have f_string_dynamic_rip() be consistent with other functions lie f_string_dynamic_append().
- iki_read is a bit sloppy in memory, I need to figure out why (and I imagine other are too).
- I've started clearing out old uses of object and content but I am concerned that I overdid the cleanup (I need to re-check some of this in the FSS programs).

There will most definitely need to be another cleanup pass on all of the programs focusing on cleaning up and improving the programs before I make my stable releases.
For now, I am ignoring those problems so I can better focus on f_string_static_t conversions.
Once the programs are updated with the current set of f_string_static_t, I still need to go through all of the remaining level_2 and lower functions to convert many of the functions still using f_string_t that should now be f_string_static_t.