Multi-line output on taf dependencies add

[n-dusan]

Instead of the first output message being a single sentence, print out the default branch and out of band commit like this:

Setting:

    Branch:                             main
    out-of-band authentication commit:  1a5dd6a124464d484dade605c27e7401c7a5d3f2.

Proceed? [y/N]:

[renatav]

I'll integrate this into the TUF metadata PR. This does not sound urgent