message: optimize reactions
diff: @@ -75,6 +75,12 @@ export function addReaction(
  throw new Error(Errors.MISSING_READ_MESSAGE_HISTORY);
  }
  + if (reaction.startsWith("<:")) {
  + reaction = reaction.substring(2, reaction.length - 1);
  + } else if (reaction.startsWith("<a:")) {
  + reaction = reaction.substring(3, reaction.length - 1);
  + }
  +
  return RequestManager.put(
  endpoints.CHANNEL_MESSAGE_REACTION_ME(
  channelID,
  