refactor(Parser)!: general refactoring of parsers (#344)

* refactor: move common info into MediaInfo

* refactor: better inference on Memo

* refactor: improved typesafety in parser methods

* refactor: remove PlaylistAuthor in favor of Author

* refactor: cleanup live chat parsers

- Replace non standard author type with Author class
- Remove redundant code

* fix: new errors due to changes

* fix: pass actions to FormatUtils#toDash

* refactor!: merge NavigatableText and Text into single class

src/parser/classes/Tab.ts

@@ -19,7 +19,7 @@ class Tab extends YTNode {
     this.title = data.title || 'N/A';
     this.selected = data.selected || false;
     this.endpoint = new NavigationEndpoint(data.endpoint);
-    this.content = Parser.parseItem<SectionList | MusicQueue | RichGrid>(data.content, [ SectionList, MusicQueue, RichGrid ]);
+    this.content = Parser.parseItem(data.content, [ SectionList, MusicQueue, RichGrid ]);
   }
 }