Added nuget support for monodevelop

Monodevelop recently added support for nuget Package Manager. Nuget has more than 69000 packages and is very popular among Visual Studio users. Thanks to Matt Ward for his work. Now monodevelop users can also use this library. Developers who only use monodevelop in their work can use nuget products more conveniently, developers who use monodevelop to manage cross-platform products originally developed by Visual Studio can easily synchronize their environments.

Ward pointed out that although it can work, it is only a beta version and does not support all features of the original nuget. For example, because mono does not support powershell, any powershell scripts contained in nuget cannot be run.