Enable teams to create resources in azure by passing a repo url [dd]

**Is your feature request related to a problem? Please describe.**

**Describe the solution you'd like**

Would love to be able to pass github URLs directly into the command lines to create resources. ie: if I did az webapp create --repo(?) https://github.com/Azure-Samples/python-docs-hello-world/tree/master/ it would create a webapp using that repo. Would be create if it could be used for all services.

az func create --repo

**Describe alternatives you've considered**

You can just clone the repo locally and then run these commands, but its just another step. :)

**Additional context**