refactor: rewrite Live Chat logic (#85)

* dev: start LiveChat refactor

* dev: implement simple module system to separate classes

+ add a few Live Chat actions

* dev: add fundamental Live Chat classes

* chore: update type declarations

* feat: finalize Live Chat

Now supporting almost all kinds of messages! Next up: add a ability to send messages.

* chore: update type declarations

* chore: update contributors list

* feat(livechat): add `sendMessage()` method

* chore: remove unneeded files

* style: format code

* chore: remove outdated examples

* chore: update tests

* chore: remove trailing spaces

* chore: remove trailing spaces x2

lib/parser/contents/classes/livechat/items/LiveChatBannerPoll.js

@@ -0,0 +1,25 @@
+'use strict';
+
+const Parser = require('../../..');
+const Text = require('../../Text');
+const Thumbnail = require('../../Thumbnail');
+
+class LiveChatBannerPoll {
+  type = 'LiveChatBannerPoll';
+  
+  constructor(data) {
+    this.poll_question = new Text(data.pollQuestion);
+    this.author_photo = Thumbnail.fromResponse(data.authorPhoto);
+   
+    this.choices = data.pollChoices.map((choice) => ({
+      option_id: choice.pollOptionId,
+      text: new Text(choice.text).toString()
+    }));
+    
+    this.collapsed_state_entity_key = data.collapsedStateEntityKey;
+    this.live_chat_poll_state_entity_key = data.liveChatPollStateEntityKey;
+    this.context_menu_button = Parser.parse(data.contextMenuButton);
+  }
+}
+
+module.exports = LiveChatBannerPoll;