Adding meson build files for json-c that work similarly to the cmake build files.
Where it made sense, I reused existing cmake .h.in files or generated entirely from meson.
All tests were done with GCC and Clang in ubuntu 24.04, Windows using MSVC 2022 and Clang-cl from llvm's repo using version 21.1.3
Signed-off-by: Tyler Erickson <tyler.erickson@seagate.com>
