core/sys/windows part 2

[Hyrtwol]

Part 2 of sys/windows procs. Some highlights:

• procs for getting various "system" info e.g. codapage
• gdi procs for bitblit with alpha blend
• palette types and procs
• redefines some of the "macro" procs to act exactly like their c counter part (main issue was missing masking of the input args)

This turned into a lot of changes so ended up adding some very basic tests.
see /tests/core/sys/windows/test_windows_generated.odin

The test will just verify type sizes and cont values. It was very tedious work so made a generator in c++, the code is a bit odd as it's "mis" using the c++ macros, so not sure if it could be part of the commit so let me know if i should trim it out?

Also I didn't find a good way to generate tests for enums but should be doable. See /tests/core/sys/windows/win32gen

(must say it is convenient to be able to look up win32 types that way, I did use these macroes for other lib projects aswell just to make sure i got the struct sizes right ;))

[Hyrtwol]

Merged in some old branches to avoid rewriting similar procs and types

[Hyrtwol]

Any chance to get this reviewed? This PR is getting old and big