Usage examples in documentation

[srameshr]

• I have searched the issues of this repository and believe that this is not a duplicate.

Version

2.2.0

Environment

Mac OS 10.13.2, N/A, 0.55

Reproduction link

https://rn.mobile.ant.design/components/popover/

Steps to reproduce

The documentation does not include any demo code on how to use the component along with GIF or pictures of the component.

What is expected?

Include simple component usage info along with GIF/Pictures for every component

What is actually happening?

The documentation does not include any demo code on how to use the component along with GIF or pictures of the component.

[BANG88]

@srameshr I have updated a working example of Button component. It use sandbox and react-native-web for preview. If you have interest in this PR are always welcome.

😄

[BANG88]

Master branch

[BANG88]

Track #119