[WSLC] add WSLC CMake file in NuGet

[chemwolf6922]

Summary of the Pull Request

Add the CMake file in the WSLC NuGet package so developers can consume the sdk in CMake easier.
Example usage:

1. Install the NuGet package:

 nuget install Microsoft.WSL.Containers -OutputDirectory .\packages -Prerelease

2. Reference in CMakeLists.txt

file(GLOB WSLC_PACKAGE_DIR "${CMAKE_SOURCE_DIR}/packages/Microsoft.WSL.Containers.*")
list(APPEND CMAKE_PREFIX_PATH "${WSLC_PACKAGE_DIR}")
find_package(Microsoft.WSL.Containers REQUIRED)

target_link_libraries(test_app PRIVATE Microsoft.WSL.Containers::SDK)

PR Checklist

• Closes: Link to issue #xxx
• Communication: I've discussed this with core contributors already. If work hasn't been agreed, this work might be rejected
• Tests: Added/updated if needed and all pass
• Localization: All end user facing strings can be localized
• Dev docs: Added/updated if needed
• Documentation updated: If checked, please file a pull request on our docs repo and link it here: #xxx

Detailed Description of the Pull Request / Additional comments

Validation Steps Performed

Tested locally with this minimal test app:

// main.cpp
#include <wslcsdk.h>
#include <cstdio>

int main()
{
    BOOL canRun{};
    WslcComponentFlags missingComponents{};
    HRESULT hr = WslcCanRun(&canRun, &missingComponents);

    if (FAILED(hr))
    {
        printf("WslcCanRun failed: 0x%08lx\n", hr);
        return 1;
    }

    printf("canRun: %d, missingComponents: %d\n", canRun, missingComponents);
    return 0;
}

# CMakeLists.txt
cmake_minimum_required(VERSION 3.25)
project(wslc-nuget-test)

file(GLOB WSLC_PACKAGE_DIR "${CMAKE_SOURCE_DIR}/packages/Microsoft.WSL.Containers.*")
list(APPEND CMAKE_PREFIX_PATH "${WSLC_PACKAGE_DIR}")
find_package(Microsoft.WSL.Containers REQUIRED)

add_executable(test_app main.cpp)
target_link_libraries(test_app PRIVATE Microsoft.WSL.Containers::SDK)

add_custom_command(TARGET test_app POST_BUILD
    COMMAND ${CMAKE_COMMAND} -E copy_if_different
        $<TARGET_RUNTIME_DLLS:test_app>
        $<TARGET_FILE_DIR:test_app>
    COMMAND_EXPAND_LISTS
)

The test app compiles fine. And prints the not implemented error code as expected.

[Copilot]

Pull request overview

Adds a CMake package config file to the Microsoft.WSL.Containers NuGet layout so CMake-based consumers can find_package(Microsoft.WSL.Containers) and link against an imported SDK target.

Changes:

• Add Microsoft.WSL.ContainersConfig.cmake implementing Microsoft.WSL.Containers::sdk as an imported target.
• Implement basic architecture detection (x64/arm64) and derive include/lib paths relative to the NuGet package root.
• Add validation for expected header/import library presence before defining the imported target.

[Copilot]

Pull request overview

Copilot reviewed 1 out of 1 changed files in this pull request and generated 1 comment.

[florelis]

Looks good to me, aside from my comment about the file location.