How can I use Community.VisualStudio.Toolkit in a CodeRefactoringProvider extension type?

[Peled-Zohar]

I've started writing my first extension with the help of ChatGpt and Claude.ai and only found out about this community after it's already uploaded to vs marketplace and running. This extension is running on Visual studio 2022 community version only (at least until I'll have the chance to install and try other versions as well).

Now I'm attempting to make the UI part more Visual studio like (currently, it's a simple WPF-based UI in a stand-alone project)
I've added the Community.VisualStudio.Toolkit.17 nuget package and the following attribute to my xaml window
xmlns:toolkit="clr-namespace:Community.VisualStudio.Toolkit;assembly=Community.VisualStudio.Toolkit"

but I I'm getting a compiler error:

Assembly 'Community.VisualStudio.Toolkit' was not found. Verify that you are not missing an assembly reference. Also, verify that your project and all referenced assemblies have been built.

What am I missing here?

BTW, here's the repository, if that helps

[Peled-Zohar]

Well, while I wasn't able to use the nuget package, I've figured my way around this issue anyway.
Since no one answered this question, it might as well be closed and deleted.