F2592 locale date time

[shewitt-au]

Problem description

In ImHex Dates and times currently have a fixed format and do not respect the selected language. MinGW’s (Windows) std::locale class is broken and basically useless. This PR implements, along with the ImHex PR linked below, date and time formatting using the Win32 API on Windows and the C runtime library on other OSes.

The motivating feature request can be found here:
Format time based on locale #2592

The corresponding ImHex changes can be found here:
ImHex changes

Implementation description

Three new files have been added:

1. "soo_buffer.hpp" in utiils. A buffer for POD types that keeps small allocations on the stack and transparently moves to heap storage when the size exceeds a configurable limit. During reallocation, the contents of the previous buffer may optionally be copied to the new one.
2. "date_time_format.hpp". A header file for new date and time formatting functions.
3. "date_time_format.cpp". The implementation of the new formatting function. On Windows some functions are also exposed that are used by the Windows version of the main formatting function.