Implement foundation for windows

Implement foundation for windows

It may be buggy and empty for now, but it formulates the basic idea.

Many functions go unused now because I wanted to have this commit as
small as possible (it is quite large as is). Some are defined and not
used, some had to be commented out to make the project pass compilation.

Immediate future work should either fix bugs or implement some visual
output to better detect bugs to be fixed.