Given we utilize fmt, we don't need to provide our own functions for formatting anymore

The minimum clang/GCC versions we support already support this. We can also
remove is_standard_layout(), as fread and fwrite only require the type to be
trivially copyable.

Now that the old macros are no longer used, we can remove all functionality related to them.

LOG_GENERIC usages will be amended in a follow-up to keep API changes separate from
interface changes, as it will require removing a parameter from the relevant function
in the VMManager class.

These are unused (and given chunk_file references Dolphin's >SVN< I doubt they were going to be used).

Functions don't need to be terminated by semicolons.

The hardware allows for some rather complicated operations to be performed on the data during the copy, this is not implemented.
Only same-format same-size raw copies are implemented for now.

This instruction is similar to the FSETP instruction, but it doesn't set a predicate, it sets the destination register to 1.0 if the condition holds, and 0 otherwise.

The rest are just macro shim registers.

It doesn't belong in the PFIFO handler.