Increase support for keyboard events

[ospfranco]

Introduction

As React-Native starts expanding to more platforms, namely macOS and Windows, the support for more keyboard events is needed

Details

To be more concrete, I'm currently trying to create a autocomplete textfield, the UI part is no problem, however, when trying to interact via keyboard events react-native simply allows no way to achieve this functionality.

Adding support for more keyboard events, either global shortcuts or on specific components (like TextInput) is, I believe, necessary.

I've created an issue on the react-native-macos repo, but since this is not implemented base rn, it doesn't seem like it will get implemented anytime soon.

Discussion points

1. Expand the range of currently fired events on the onKeyPress handler
2. Add the ability to call preventDefault on keyboard events to stop propagation to any currently focused component
3. Adding support for global shortcuts