[core] Synchronizers

[davidkpiano]

Added support for synchronizers in XState, allowing state persistence and synchronization across different storage mechanisms.

• Introduced Synchronizer interface for implementing custom synchronization logic
• Added sync option to createActor for attaching synchronizers to actors

import { createActor } from 'xstate';
import { someMachine } from './someMachine';
import { createLocalStorageSync } from './localStorageSynchronizer';

const actor = createActor(someMachine, {
  sync: createLocalStorageSync('someKey')
});

[changeset-bot]

🦋 Changeset detected

Latest commit: c659467

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 6 packages

Name	Type
xstate	Minor
@xstate/graph	Major
@xstate/react	Major
@xstate/solid	Major
@xstate/svelte	Major
@xstate/vue	Major

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