Add Support for an 'ios' rid. Add win-arm64 support for packages.

We need to start shipping .xcframeworks for iOS as we cannot use
.dylib files in iOS applications.
This change adds support for the 'ios' runtime identifier (rid) in our
build process, allowing us to include "fat" .xcframeworks for iOS and
the iOS Simulator in one package.

Additionally, this change adds support for the 'win-arm64' runtime
identifier (rid) for our packages, enabling us to build and publish
NuGet packages that target Windows on ARM64 architecture.

Author: dellis1972

Tasks/PublishLibraryTask.cs

@@ -21,6 +21,7 @@ public override async Task RunAsync(BuildContext context)
             "osx",
             "osx-x64",
             "osx-arm64",
+            "ios",
             "ios-arm64",
             "iossimulator-x64",
             "iossimulator-arm64",

Tasks/PublishPackageTask.cs

@@ -38,6 +38,7 @@ public override async Task RunAsync(BuildContext context)
                 "osx-arm64"
             };
         var optionalRids = new string[] {
+                "ios",
                 "ios-arm64",
                 "iossimulator-x64",
                 "iossimulator-arm64",
@@ -47,6 +48,7 @@ public override async Task RunAsync(BuildContext context)
                 "android-x64",
                 "linux-arm",
                 "linux-arm64",
+                "win-arm64",
         };
 
         // Download built artifacts