[Windows] Implement OneCore TTS support using C++/WinRT (no deps).

[bruvzg]

Fixes #69788

Alternative version of #116126, without bundled dependencies, WinRT part is optional and can be downloaded using script (MinGW only, MSVC always has it).

[akien-mga]

Looks great to me.
Likely needs a rebase to handle clang-format/include changes.

[Repiteo]

Thanks!

[romgerman]

Hello. This broke the build for me on MSVC

[  6%] C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\VC\Tools\MSVC\14.44.35207\include\experimental/coroutine(35): fatal error C1189: #error:  The <experimental/coroutine> and <experimental/resumable> headers are only supported with /await and implement pre-C++20 coroutine support. Use <coroutine> for standard C++20 coroutines.
[  7%] C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\VC\Tools\MSVC\14.44.35207\include\experimental/coroutine(35): fatal error C1189: #error:  The <experimental/coroutine> and <experimental/resumable> headers are only supported with /await and implement pre-C++20 coroutine support. Use <coroutine> for standard C++20 coroutines.

According to this issue microsoft/cppwinrt#866 (comment) Windows SDK 10.0.19 (Windows 10) is not supported anymore. Installing Windows SDK 10.0.26 (Windows 11) fixes it.

[vaner-org]

Which script fixes build on MinGW?

[  6%] ERROR: In file included from platform\windows\tts_driver_onecore.cpp:31:
platform\windows\tts_driver_onecore.h:43:10: fatal error: winrt/Windows.Foundation.Collections.h: No such file or directory
   43 | #include <winrt/Windows.Foundation.Collections.h>
      |          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
compilation terminated.

[  7%] ERROR: In file included from platform\windows\tts_windows.cpp:36:
platform\windows\tts_driver_onecore.h:43:10: fatal error: winrt/Windows.Foundation.Collections.h: No such file or directory
   43 | #include <winrt/Windows.Foundation.Collections.h>
      |          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
compilation terminated.

[bruvzg]

Which script fixes build on MinGW?

misc/scripts/install_winrt.py