Improve first-time launch questionnaire UX

[chrnorm]

This message is very confusing:

ℹ️  Thanks for using Granted!
ℹ️  Start by configuring which browser to use when launching the AWS console.
ℹ️  By default, Granted will open the AWS console with this browser: Firefox.
ℹ️  Granted works best with Firefox but also supports Chrome, Brave, and Edge (https://granted.dev/browsers). You can change this setting later by running 'granted browser set'
? Do you want Granted to use a different installed browser when launching the AWS console? No

Instead of asking me not to use a different browser, we should just ask:

? Use Firefox to view the AWS Console? Y/n

The double negative here is confusing as to what the option actually means.

Additionally,

Do you want to use a browser other than your default browser for SSO logins? (y/N)

Should be replaced with

Use Firefox to log in to AWS SSO? (y/N)