[lib] Create a redux store where ops will be stored

Summary:
Create the store. By default, it should contain an empty array.

https://linear.app/comm/issue/ENG-7096/add-a-new-field-in-redux-where-ops-are-stored

Test Plan: Inspect Redux on web and native and check if the store is present. Also close and reopen the app to make sure that there are no inconsistencies.

Reviewers: kamil, inka, will

Reviewed By: kamil

Subscribers: ashoat

Differential Revision: https://phab.comm.dev/D11259