CK3 coats of arms

Copy coat of arms puts the coat on the clipboard as the definition from common/coat_of_arms (its @values worked out), keyed by the title ID — the script format of the game's own Copy buttons (the ruler designer copies DNA as ruler_designer_…={ … }). Paste it in the coat-of-arms designer. Not tried in the game yet.

The rest of the county and barony titles get a coat made at random when a game starts, so they have none here; coats a title takes on in play (a conquest, a new dynasty) are not shown.