Fix npub formatting, add copy npub ez button in profile view

[alltheseas]

what happens

npub is cutoff in coracle profile view

suggestion

1. show full npub in one or more lines depending on browser size (do not cut off)
2. bonus points: add copy npub button for ez access immediately adjacent to npub

[staab]

This has been reformatted to include an ellipsis, but adding a copy icon to the right of the npub (with a toast to indicate success) would be good.