Make a credential loading card

[janrtvld]

Currently, when we issue a credential it shows a loading spinner when the request is being processed. Then, after the credential request is completed the credential card is shown with a loading spinner waiting for the user to accept it.

There is a small flicker in between:

Screen.Recording.2022-09-02.at.14.23.37.mov

It would be nice if we have a placeholder credential card where the card indicates that the credential is loading (presumably with a pulsing effect). Like this:

We should add an 'empty' credential card as a placeholder while the isLoading property is true.

[jimezesinachi]

I think we can close this now

[jimezesinachi]

@janrtvld