Add a basic pokedex app which uses an external api and sqflite database!

[Lalit3716]

Add a basic Pokedex app that uses pokeapi to demonstrate how to work with API calls and manage state in your app as well as persist data using sqflite.

This is the GitHub repo that will be added: https://github.com/Lalit3716/Pokedex-Flutter-App/tree/master/lib