Add support for React Native for Windows

[tido64]

https://microsoft.github.io/react-native-windows/

Blocked by:

• Improve Metro support for out-of-tree platforms

Tasks:

• Implement Windows test app (Implement Windows test app #89)
• Add Windows target to Plop template (Add Windows target to Plop template #90)
• Update the wiki and document platform specifics

[tido64]

Closed in favour of Windows project.