feat(parser): add InfoPanelContent and InfoPanelContainer nodes

These are usually used to add more context to videos that discuss misinformation.

Fixes: #326

src/parser/classes/InfoPanelContainer.ts

@@ -0,0 +1,27 @@
+import { YTNode } from '../helpers.js';
+import Parser, { RawNode } from '../index.js';
+import InfoPanelContent from './InfoPanelContent.js';
+import Menu from './menus/Menu.js';
+import Text from './misc/Text.js';
+
+export default class InfoPanelContainer extends YTNode {
+  static type = 'InfoPanelContainer';
+
+  icon_type?: string;
+  title: Text;
+  menu: Menu | null;
+  content: YTNode | null;
+  background: string;
+
+  constructor(data: RawNode) {
+    super();
+    this.title = new Text(data.title);
+    this.menu = Parser.parseItem(data.menu, Menu);
+    this.content = Parser.parseItem(data.content, InfoPanelContent);
+    this.background = data.background;
+
+    if (data.icon?.iconType) {
+      this.icon_type = data.icon.iconType;
+    }
+  }
+}

src/parser/classes/InfoPanelContent.ts

@@ -0,0 +1,33 @@
+import { YTNode } from '../helpers.js';
+import { RawNode } from '../index.js';
+import Text from './misc/Text.js';
+import Thumbnail from './misc/Thumbnail.js';
+import NavigationEndpoint from './NavigationEndpoint.js';
+
+export default class InfoPanelContent extends YTNode {
+  static type = 'InfoPanelContent';
+
+  title: Text;
+  inline_link_icon_type?: string;
+  source: Text;
+  paragraphs: Text[];
+  thumbnail: Thumbnail[];
+  source_endpoint: NavigationEndpoint;
+  truncate_paragraphs: boolean;
+  background: string;
+
+  constructor(data: RawNode) {
+    super();
+    this.title = new Text(data.title);
+    this.source = new Text(data.source);
+    this.paragraphs = data.paragraphs.map((p: RawNode) => new Text(p));
+    this.thumbnail = Thumbnail.fromResponse(data.thumbnail);
+    this.source_endpoint = new NavigationEndpoint(data.sourceEndpoint);
+    this.truncate_paragraphs = !!data.truncateParagraphs;
+    this.background = data.background;
+
+    if (data.inlineLinkIcon?.iconType) {
+      this.inline_link_icon_type = data.inlineLinkIcon.iconType;
+    }
+  }
+}