Document consuming of addins / nuget packages from Azure Artifact feed

We regularly get questions how to use NuGet packages or addins from Azure Artifact feeds. Even though not related to Cake directly, it could help if we have documentation how to consume packages from different feeds for the most common scenarios.

No file, test, or documentation entry point is identified in the issue. Start by reviewing the website's existing guidance for consuming addins and packages, then define the most common Azure Artifact feed scenarios to cover. Done means the website explains those scenarios clearly and consistently with its current documentation structure.

Written by the indexing model from the issue text.