Context: https://github.com/CommunityToolkit/Maui.NativeLibraryInterop
Introduces a `@(XcodeProject)` build action which can be used to build
and consume the outputs of Xcode framework projects.
The following metadata are supported on this item:
```xml
<XcodeProject Include="path/to/myproject.xcodeproj" >
<Configuration>Release</Configuration>
<CreateNativeReference>true</CreateNativeReference>
<ForceLoad></ForceLoad>
<Frameworks></Frameworks>
<Kind>Framework</Kind>
<OutputPath></OutputPath>
<SchemeName></SchemeName>
<SmartLink></SmartLink>
<Visible></Visible>
</XcodeProject>
```
* `%(SchemeName)`: The name of the build scheme or target that should
be used to build the project.
* `%(Configuration)`: The name of the configuration to use to build the
project. The default value is `Release`.
* `%(CreateNativeReference)`: Output XCFRAMEWORK files will be added as
a `@(NativeReference)` to the project. Metadata supported by
`@(NativeReference)` like `%(Kind)`, `%(Frameworks)`, or `%(SmartLink)`
will be forwarded if set. The default value is `true`.
* `%(OutputPath)`: Can be set to override the XCARCHIVE and XCFRAMEWORK
output path of the Xcode project. The default value is
`$(IntermediateOutputPath)xcode/{SchemeName}-{Hash}`.
A new `_BuildXcodeProjects` target will attempt to build XCARCHIVE and
XCFRAMEWORK files for each `@(XcodeProject)` item. These outputs will be
created for the platform specified in the target framework. If multiple
target frameworks are specified, the project will be built for each
platform during each inner build.
A new `$(MaciOSPrepareForBuildDependsOn)` build extension point has been
added to allow customer projects to more easily hook into the beginning
of the build process.
---------
Co-authored-by: Peter Collins <pecolli@microsoft.com>
Co-authored-by: Alex Soto <alex@soto.dev>
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