Added tab to display only the id-token

[nabadger]

@fciocchetti does this look alright?

If the wording makes sense, I'll update the screenshot in the main readme and we can merge it in.

I would like to add some blurb about how the token could be used by other services too, but nothing too specific.

*note, it's a fake token ;)

[primeroz]

Looks good