refactor: migrate parsers to TS (#133)

* dev: finish top-level parsers TS migration

* dev: migrate menu renderers to TS

* chore: fix ts errors

* dev: finish ts migration 🎉

src/parser/classes/SearchBox.ts

@@ -0,0 +1,23 @@
+import Parser from '../index';
+import Text from './misc/Text';
+import NavigationEndpoint from './NavigationEndpoint';
+import { YTNode } from '../helpers';
+
+class SearchBox extends YTNode {
+  static type = 'SearchBox';
+
+  endpoint: NavigationEndpoint;
+  search_button;
+  clear_button;
+  placeholder_text: Text;
+
+  constructor(data: any) {
+    super();
+    this.endpoint = new NavigationEndpoint(data.endpoint);
+    this.search_button = Parser.parse(data.searchButton);
+    this.clear_button = Parser.parse(data.clearButton);
+    this.placeholder_text = new Text(data.placeholderText);
+  }
+}
+
+export default SearchBox;