Move CheckoutStateProvider into a data store and create a hook to interact with the store

[opr]

CheckoutStateProvider should be moved into a data store and a hook should be created to abstract interaction with it.

There is an existing reducer related to this context provider found in this file https://github.com/woocommerce/woocommerce-gutenberg-products-block/blob/5dac3a0e74e2de9c4a4bfecca3f15b380b05433f/assets/js/base/context/providers/cart-checkout/checkout-state/reducer.ts which should be moved into the reducer used by @wordpress/data.

Sub-tasks required to solve this issue

• Create data store
• Refactor existing reducer into the one used by the data store above
• Implement actions and selectors for values that the context previously returned
• Create a hook that can be used to easily interact with the data store (reducing the need for repeated use of useSelect and useDispatch)

[github-actions]

This issue has been marked as stale because it has not seen any activity within the past 60 days. Our team uses this tool to help surface issues for review. If you are the author of the issue there's no need to comment as it will be looked at.

Internal: After 10 days with no activity this issue will be automatically be closed.