Add prominent share/copy button on profiles in web UI (#27865)

app/javascript/mastodon/locales/en.json

@@ -21,6 +21,7 @@
   "account.blocked": "Blocked",
   "account.browse_more_on_origin_server": "Browse more on the original profile",
   "account.cancel_follow_request": "Cancel follow",
+  "account.copy": "Copy link to profile",
   "account.direct": "Privately mention @{name}",
   "account.disable_notifications": "Stop notifying me when @{name} posts",
   "account.domain_blocked": "Domain blocked",
@@ -191,6 +192,7 @@
   "conversation.mark_as_read": "Mark as read",
   "conversation.open": "View conversation",
   "conversation.with": "With {names}",
+  "copy_icon_button.copied": "Copied to clipboard",
   "copypaste.copied": "Copied",
   "copypaste.copy_to_clipboard": "Copy to clipboard",
   "directory.federated": "From known fediverse",