[Feature Request] Support AzDevOps (Nuget) Feed Management

**Is your feature request related to a problem? Please describe.**
Attempting to manage Nuget feeds.

Using raw REST APIs described here.
https://docs.microsoft.com/en-us/rest/api/azure/devops/artifacts/feed%20%20management?view=azure-devops-rest-6.0

**Describe the solution you'd like**
Add base command:

feed : Manage Azure artifact feeds.

**Additional context**
CLI support would be helpful in fixing security vulnerability: critical Nuget package substitution attack.