Add example projects

[amitdahan]

Summary

I propose adding some example projects to consume the picker.

For example:

• examples/with-nextjs
• examples/with-create-react-app
• ...

This will serve 3 purposes:

1. "Documentation" for how to use the picker from common environments
2. E2E tests for common usage patterns which will increase stability as changes are made to the picker
3. Provide an alternative for Storybook for locally testing changes

[junaidalphasquad]

@ealush - Can you please provide an example of using Next.js? Also, how can use it with a simple input tag and show/hide the emoji preview modal by clicking on another emoji icon?