Update messaging for login command

[chrisscott]

Description

• Be more clear on the next step
• Use Device Confirmation instead of pairing to match language on the Universal Login page
• Use a spinner while waiting for login to complete in the browser
• Be more concise

Before

After

References

CLI-135

Testing

Test login command to completion and also canceling it out.

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 main

[Widcket]

Awesome, thank you! Nicely done 👍🏼