feat(WTF): Add support for WTF

1) Install https://chrome.google.com/webstore/detail/web-tracing-framework/gmdhhnlkjmknaopofnadmoamhmnlicme
2) Enjoy the visibility
Do we need a class here ?

There could be only var / function scoped by the lib: 
```
import 'package:angular/wtf.dart' as WTF;

WTF.init();
```