Support MinGW-w64's WinRT headers in zig cc

[silbinarywolf]

Zig Version

0.14.0

Steps to Reproduce and Observed Behavior

Not sure if the removal of the following headers was intentional but it breaks compilation of SDL3. The current workaround is to simply include the following files by other means if you want to build for Windows.

Main include missing:
{zig-0.13.0}\lib\libc\include\any-windows-any\windows.gaming.input.h

Dependencies of above include:
windows.devices.haptics.h
windows.devices.power.h
windows.foundation.collections.h
windows.foundation.h
windows.foundation.numerics.h
windows.gaming.input.forcefeedback.h
windows.system.h
windows.system.power.h
windowscontracts.h
eventtoken.h
ivectorchangedeventargs.h

Zip of above files if you want to quickly / easily fix your SDL3 build
any-windows-any-from-zig-0.13.0.zip

Files are also used in my own project here:
https://github.com/silbinarywolf/desk-breaker/tree/4f47bd9faa2d3eb4e5fb69fd4a4a2fef82284e33/third-party/sdl/upstream/any-windows-any

Expected Behavior

That these files would not be removed from lib\libc\include\any-windows-any between Zig 0.13.0 and Zig 0.14.0

[castholm]

Arguably not a bug and rather an intentional change to reduce the installation size, see #22156 and the discussion near the bottom of it. Note that WGI is an optional dependency of SDL3 only required for compatibility with some Xbox controller features and that SDL3 is perfectly buildable without it.

[alexrp]

I think what we could do is provide MinGW-w64's WinRT headers as a Zig package that an SDL Zig package could take an optional dependency on. Alternatively, once #16270 happens and zig cc itself becomes a separate package, shipping WinRT headers with it might be more acceptable since it won't impact the main Zig distribution. The latter approach would of course be preferable for the zig cc-without-Zig-build-system use case.