Add client secret to output when creating a regular web application

[mraible]

Describe the problem you'd like to have solved

Currently, when you create a Regular Web Application using auth0 apps create, it doesn't display the client secret in the output. You have to run auth0 apps open to get the client secret. This is kind of a pain for developers doing tutorials using the CLI.

Describe the ideal solution

The client secret appears below the client ID.

Alternatives and current workarounds

auth0 apps open