feat(yt): add getGuide() (#335)

* feat(yt): add `getGuide()`

* chore: lint

* fix(Guide): wrong prop

* fix(Guide): include subscription section

* fix(Guide): wrong import

* feat(Guide): add `page`

src/parser/classes/GuideSection.ts

@@ -0,0 +1,20 @@
+import Text from './misc/Text.js';
+import { YTNode } from '../helpers.js';
+import Parser from '../parser.js';
+
+class GuideSection extends YTNode {
+  static type = 'GuideSection';
+
+  title?: Text;
+  items;
+
+  constructor(data: any) {
+    super();
+    if (data.formattedTitle) {
+      this.title = new Text(data.formattedTitle);
+    }
+    this.items = Parser.parseArray(data.items);
+  }
+}
+
+export default GuideSection;