title: building libpq and pg_confing on windows with MSVC/VS19 (postgresql 13.2)
body: <p>long story short, i need pythons psycopg2 site package that depends on libpq and pg_config from postgresql. I don't need the entire postgresql just those two artifacts. on linux the build was super easy since the command line build allows to build and install only those two artifacts. Is there a simple way to do it on Windows with MSVC? some CMake port maybe? i did look at the doc for Postgresql 13.2 and its of no use for windows builds and i cant find any useful info for versions greater then 9.x</p>
  <p>if there is at least a simple way to build the entire postgresql for windows that would be a good start.</p>