parseEmotes options (and custom emote factories)

[doceazedo]

Add an options parameter for more flexibility and remove channelId in favor of it.

type ParseEmotesOptions = {
  channelId?: string;
  thirdPartyProviders?: {
    bttv?: boolean;
    ffz?: boolean;
  };
  customEmotes: EmotesFactory | EmotesFactory[]
}

Descriptions:

• channelId being optional will allow the use of only global or custom emotes
• thirdPartyProviders will allow to toggle third-party emotes and help adding others in the future
• customEmotes will allow the use of custom emote factories, provided by the user

All third-party providers will be defaulted to true.