refactor!: rewrite Analytics to TypeScript (#122)

* refactor: migrate all analytics’ classes to TypeScript

Also, add AnalyticsShortsCarouselCard and AnalyticsRoot.

src/parser/classes/analytics/AnalyticsMainAppKeyMetrics.ts

@@ -0,0 +1,18 @@
+import DataModelSection from './DataModelSection';
+import { YTNode } from '../../helpers';
+
+class AnalyticsMainAppKeyMetrics extends YTNode {
+  static type = 'AnalyticsMainAppKeyMetrics';
+
+  period: string;
+  sections: DataModelSection[];
+
+  constructor(data: any) {
+    super();
+    this.period = data.cardData.periodLabel;
+    const metrics_data = data.cardData.sections[0].analyticsKeyMetricsData;
+    this.sections = metrics_data.dataModel.sections.map((section: any) => new DataModelSection(section));
+  }
+}
+
+export default AnalyticsMainAppKeyMetrics;