[feature] Show + federate emojis in accounts (#837)

* Start adding account emoji

* get emojis serialized + deserialized nicely

* update tests

* set / retrieve emojis on accounts

* show account emojis in web view

* fetch emojis from db based on ids

* fix typo in test

* lint

* fix pg migration

* update tests

* update emoji checking logic

* update comment

* clarify comments + add some spacing

* tidy up loops a lil (thanks kim)

internal/typeutils/astointernal.go

@@ -88,6 +88,13 @@ func (c *converter) ASRepresentationToAccount(ctx context.Context, accountable a
 		acct.DisplayName = displayName
 	}
 
+	// account emojis (used in bio, display name, fields)
+	if emojis, err := ap.ExtractEmojis(accountable); err != nil {
+		log.Infof("ASRepresentationToAccount: error extracting account emojis: %s", err)
+	} else {
+		acct.Emojis = emojis
+	}
+
 	// TODO: fields aka attachment array
 
 	// note aka summary