So far it is just a copy of the official vcpkg 2024.02.14 version.

Specifically this fix:
Amanieu/asyncplusplus#47

Unfortunately, 2.5 years later, a new official version including that fix still hasn't been released.

This is a copy of cesium-unreal commit:
CesiumGS/cesium-unreal@d5bb575

This is normal for UWP builds.

10.13 doesn't support std::filesystem::path.

These were copied from cesium-unreal.

At commit 00a26bd8823f3e9b69d86ec584eb4580e601ac1b.

This will hopefully fix bitcode conflicts because newer versions of xcode don't do bitcode at all.

The potentially old and busted make included with the potentially old
and busted Android NDK fails to build our project because it generates
command lines that exceed the Windows limit. Ugh. Hopefully Ninja will
work better.

Because it randomly failed.

Previously we were assuming all generated code was ours, and including
it all in the built package. In Unity 2022.3, this assumption no longer
holds.

The JDK module name was deduced by running:

```
"C:/Program Files/Unity Hub/Unity Hub.exe" -- --headless install-modules --version 2022.3.41f1 --changeset 0f988161febf --module android android-sdk-ndk-tools android-open-jdk universal-windows-platform uwp-il2cpp
```

And replacing android-sdk-ndk-tools with Unity's recommendation.

Sometimes, during the tests, the managed CesiumIonSession could get
garbage collected before the requests made as part of the "resume"
completed. Because we were using the corresponding Impl class in the
continuations, and the Impl class's lifetime is controlled by the
lifetime of the managed object, this would sometimes cause a crash. The
solution implemented here is to make sure the continuations also keep
the managed instance alive. We also check to see if the held managed
instance becomes nullptr, which handles causes like AppDomain unload.

So hopefully we'll get ARM on ARM.

If we don't specify, it sits there waiting for us to choose.

This will hopefully drastically speed up the macOS build because it
won't have to wait ages for the audio system to time out.

Build and CI improvements, building on vcpkg