missing header files in source package

[toppk]

using python 3.12, and since there isn't a prebuilt wheel I pip is using the source ball, which only has yyjson.h and not document.h headers, as such I'm getting this error message:

  creating build/temp.linux-x86_64-cpython-312
  creating build/temp.linux-x86_64-cpython-312/yyjson
  gcc -fno-strict-overflow -Wsign-compare -DDYNAMIC_ANNOTATIONS_ENABLED=1 -DNDEBUG -fcf-protection -fexceptions -fcf-protection -fexceptions -fcf-protection -fexceptions -fPIC -I/home/toppk/.py312/include -I/usr/include/python3.12 -c yyjson/binding.c -o build/temp.linux-x86_64-cpython-312/yyjson/binding.o
  yyjson/binding.c:4:10: fatal error: document.h: No such file or directory
      4 | #include "document.h"
        |          ^~~~~~~~~~~~
  compilation terminated.
  error: command '/usr/lib64/ccache/gcc' failed with exit code 1

adding the .h files in setup.py fixes that, but not sure if there's a better fix. let me know if you want a pr.

[TkTech]

Fixed and wheels for 3.12 building now.