Remove references to stale winmd files to fix incremental builds (mic…

…rosoft#1404)

The original attempt at a fix for this was too aggressive:
https://github.com/microsoft/cppwinrt/pull/1381/files

This fix is targeted specifically at removing references to stale winmd files that have yet to be copied from referenced projects (e.g., from a runtime component to an app).

Update build.yml for Azure Pipelines (microsoft#1384)

microsoft#1338 changed the NuGet version to a property, but didn't update the build.yml to do the same thing

Allow classic COM interfaces with get_self (microsoft#1314)

* Allow classic COM interfaces with get_self

Fixes microsoft#1312

* Fix mingw builds

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Co-authored-by: Kenny Kerr <kenny@kennykerr.ca>

Update issue template to use `cpp` instead of `rust` (microsoft#1313)

Remove explicitly setting PreferredToolArchitecture, since VS 2022 ha…

…ndles this more comprehensively (microsoft#1304)

Add a clang-specific impl->projection conversion operator (microsoft#…

…1274)

Workaround for false positive code analysis warning (microsoft#1269)

Partial GCC compatibility improvements (microsoft#1234)

Efficient way to format directly to hstring (microsoft#1207)

C++ Streams support for hstring and IStringable (microsoft#1221)