Central page for explaining how to add NuGet packages

[michael-hawker]

Maybe we should create an issue around having a centralized managing NuGet package page we can link to across all toolkit getting started docs?

Originally posted by @michael-hawker in https://github.com/MicrosoftDocs/CommunityToolkit/pull/51#discussion_r844462837

Lots of our getting started guides explain more about getting started with NuGet. We should either just link to existing guidance or have a central page we can all share for this which is customized to be more about finding CommunityToolkit based packages?

[bijington]

@michael-hawker I like the idea. Perhaps if we don't reach a common single page we can share perhaps we could make use of an include file so that we can still share some of the content?

We currently have this include folder: https://github.com/MicrosoftDocs/CommunityToolkit/tree/main/docs/maui/includes where we make use of the preview banner throughout our pages: https://github.com/MicrosoftDocs/CommunityToolkit/blob/9afc451be77bdecfbc29732110700e3e7951e04a/docs/maui/index.md?plain=1#L12