Fix quickstarts download issues [CLI-53]

[Widcket]

Description

Screen.Recording.2021-03-03.at.00.17.35.mov

Removed the 'type' flag and prompt

In the quickstarts download command, the first thing the code does is to use the client-id to fetch a Client instance from the Management API. In that instance, the app type is already available so there is no need to ask the user for it.

Added a prompt for 'client-id'

The client-id could only be passed via flag while all the other inputs could be prompted. Also added a shorthand letter for the flag.

Added a confirmation prompt before overriding

When the quickstart folder already existed, the command bailed out instructing the user to use the --force flag.

Removed existing quickstart folder before unzipping

The existing files in the folder could cause an error.

Made texts consistent with other commands

Also edited them for clarity around what the command does. This command should probably be called samples download, though, since the quickstarts are tutorials that reference sample apps, but the sample apps are not quickstarts.

Returned an error when running in non-interactive mode

• The use case for this command only makes sense when run by a human being
• This can be changed later if other use cases pop up

Testing

• This change adds test coverage for new/changed/fixed functionality

Checklist

• I have added documentation for new/changed functionality in this PR or in auth0.com/docs
• All active GitHub checks for tests, formatting, and security are passing
• The correct base branch is being used, if not master

[cyx]

Excellent work! Thanks for doing this 💪