code\Skills folder and files not exits on main branch

[sanme98]

Hi, in the main branch, the code\Skills folder does not exist, but it is specified in the solution file.

[info] C:\Program Files\dotnet\sdk\9.0.300\NuGet.targets(509,5): error MSB3202: The project file "D:\xxxx\mastering-github-copilot-for-dotnet-csharp-developers\code\Skills\Skills.csproj" was not found. [D:\xxxx\mastering-github-copilot-for-dotnet-csharp-developers\code\MasteringCopilot.sln]

Thank you.