refactor(parser): type YTNodes' data arg as RawNode (wip) (#339)

* replaced YTNode's data arg as RawNode

* updated documentation

* removed unused import

---- Note that there are still many nodes that need to be updated, hence the WIP status.

src/parser/classes/livechat/items/LiveChatTextMessage.ts

@@ -6,6 +6,7 @@ import MetadataBadge from '../../MetadataBadge.js';
 import Text from '../../misc/Text.js';
 import Thumbnail from '../../misc/Thumbnail.js';
 import NavigationEndpoint from '../../NavigationEndpoint.js';
+import type { RawNode } from '../../../index.js';
 
 class LiveChatTextMessage extends YTNode {
   static type = 'LiveChatTextMessage';
@@ -26,7 +27,7 @@ class LiveChatTextMessage extends YTNode {
   timestamp: number;
   id: string;
 
-  constructor(data: any) {
+  constructor(data: RawNode) {
     super();
     this.message = new Text(data.message);