UWP: Migrate from C++/CX to C++/WinRT

[SternXD]

Description

Migrates the UWP code from C++/CX to C++/WinRT.

C++/CX is a deprecated, non-standard language extension. C++/WinRT is the replacement, giving us better compatibility and support. I have smoke tested this for a few hours with no regressions I could find.

EDIT here's what Microsoft says about it:

C++/WinRT is the recommended alternative to C++/CX. It is a new, standard C++17 language projection for Windows Runtime APIs, available in the latest Windows SDK from version 1803 (10.0.17134.0) onward. C++/WinRT is implemented entirely in header files, and designed to provide you with first-class access to the modern Windows API.
With C++/WinRT, you can both consume and author Windows Runtime APIs using any standards-conformant C++17 compiler. C++/WinRT typically performs better and produces smaller binaries than any other language option for the Windows Runtime. We will continue to support C++/CX and WRL, but highly recommend that new applications use C++/WinRT. For more information, see C++/WinRT.

Changes:

• Replaced ref class with winrt::implements<>
• Converted Platform::String^ to winrt::hstring
• Updated event handlers to use C++/WinRT delegates with proper cleanup
• Replaced ref new with winrt::make<>
• Updated async helpers to use C++/WinRT IAsyncOperation and exception handling
• Removed some duplicate includes that weren't needed
• Added specific Xbox model detection (One, One S, One X, Series S, Series X) via Gaming Device Information API (this changes it from Xbox One/Series CPU in the system info to actually show what console the user is on)

Click to see Console Screenshot

Click to see Desktop Screenshot

Reviewers

@LibretroAdmin

[SternXD]

whoops let me fix the CI :/