Support for MacCatalyst

Reproduction steps

Created a new .NET MAUI app and launched it with MacCatalyst. When making a call to Repository.IsValid(projectPath); it will throw the following. Looking at the output folder, the runtimes are not copied there. I have tried manipulating the output folder, but it doesn't seem to be able to resolve the native library properly.

{System.TypeInitializationException: The type initializer for 'LibGit2Sharp.Core.NativeMethods' threw an exception.
 ---> System.DllNotFoundException: git2-e632535
   at LibGit2Sharp.Core.NativeMethods.InitializeNativeLibrary() in **/_/LibGit2Sharp/Core/NativeMet…}**

Running the same command via a console application (.NET 7.0 CLI, not MacCatalyst) executes as expected.

Expected behavior

Native libraries should be copied to the output folder and made available, if possible, for the MacCatalyst platform.

Actual behavior

Native libraries are not copied over and cannot be referenced on MacCatalyst.

Version of LibGit2Sharp (release number or SHA1)

0.27.2

Operating system(s) tested; .NET runtime tested

.NET 7.0 via MacCatalyst-x64 (Mac M1).

首先在 .NET 7 MacCatalyst-x64 应用中重现 Repository.IsValid(projectPath)，并检查 Core/NativeMethods 以及输出文件夹。将 MacCatalyst 输出与正常工作的控制台应用的原生运行时文件进行比较；完成的标准是所需的原生库已在 MacCatalyst 上复制并解析。