asyncredux-persistence

## Overview AsyncRedux provides state persistence by passing a `persistor` object to the Store. This maintains app state on disk, enabling restoration between sessions. ## Store Initialization with Persistor At startup, read any existing state from disk, create default state if none exists, then initialize the store: ```dart var persistor = MyPersistor(); var initialState = await persistor.readState(); if (initialState == null) { initialState = AppState.initialState(); await persistor.saveInitialState(initialState); } var store = Store<AppState>( initialState: initialState, persistor: persistor, ); ``` ## The Persistor Abstract Class The `Persistor<St>` base class defines these methods: ```dart abstract class Persistor<St> { /// Read persisted state, or return null if none exists Future<St?> readState(); /// Delete state from disk Future<void> deleteState(); /// Save state changes. Provides both newState and lastPersistedState /// so you can compare them and save only the difference. Future<void> persistDifference({ required St? lastPersistedState, required St newState }); /// Convenience method for initial saves Future<void> saveInitialState(St state) => persistDifference(lastPersistedState: null, newState: state); /// Controls save frequency. Return null to disable throttling. Duration get throttle => const Duration(seconds: 2); } ``` ## Creating a Custom Persistor Extend the abstract class and implement the requir...