[Feature]: Add public notes to the faucet

[Dominik1999]

To whom is this feature for?

End user

Why is is this feature needed?

Alice loves the new faucet and that she can get a private note with some tokens. Now, she wants also to check out the second flow and receive a public note via the blockchain.

How is this feature used?

Alice wants to be able to click either a button "Public notes" or a button "Private notes".

If she clicks "Public notes" the faucet should execute a transaction using --note-type public. If she clicks "Private notes" the type should be --note-type private.

Anything else?

We could add a short explanation how to consume the note then. But we can also add this later

[bobbinth]

Closed by #339.