Add redux

[makunomark]

Adds redux for use as a state manager using redux toolkit. Redux enforces a unidirectional flow of data making it easy to debug and manage state. To add a new state

1. Create or add to an existing slice state or a reducer or both.
2. Add your new reducer to the store.
3. In a component, start reading state and dispatching actions.

ref: https://hybridheroes.de/blog/2021-01-08-redux-toolkit-react-native/

To do

• [ ] Add & test support for async redux (Redux thunk) - issue

[brianwachira]

I am seeing some merge conflicts. You may need to merge with the current "develop" branch?

[makunomark]

I am seeing some merge conflicts. You may need to merge with the current "develop" branch?

All fixed 😊