Feature/creaing extension version to visual studio 2022

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Following Update a Visual Studio extension for Visual Studio 2022 to make the extension available for Visual Studio 2022.

Please be noted that not all the steps in the documents has been implemented. My goal is to make this extesion work for VS22 and it actually works. I did not update the files in build folder as somehow the batch file is not working for me and I need to do it manually as following.

To generate the VSIX(for extension installation) file, I open NuGetReferenceSwitcher.VS22.sln and build it in Release mode. After build you can find the VSIX file in the \build\Output\VS22 and run it to install the extension.