Add capacity examples

[shutchings]

Sample snippet contributions

For client library sample snippets, review and follow the snippet contribution guidance

• Follow organization guidelines
• Use real types (avoids var)
• Use Context.Log (avoids Console.WriteLine)
• Sample should clean up resources they create
• Avoid samples that arbitrarily destroy data

[shutchings]

These examples call an API that isn't released yet. I generated them by building the client locally and using that package. Is that the correct procedure?

[danhellem]

@shutchings if the API is not public then we probably should not be showing sample code for it yet. Do you know when the API will be public?

[vtbassmatt]

Can you retarget this at main and fix the conflict? Then we can merge. Thanks!