feat: add sending user requests to process (#1908)

* feat: add sending user requests to process

* fix(snjs): yarn lock

* fix(snjs): imports

* fix: specs

packages/services/src/Domain/Sync/SyncServiceInterface.ts

@@ -1,7 +1,14 @@
 /* istanbul ignore file */
 
+import { FullyFormedPayloadInterface } from '@standardnotes/models'
 import { SyncOptions } from './SyncOptions'
 
 export interface SyncServiceInterface {
   sync(options?: Partial<SyncOptions>): Promise<unknown>
+  resetSyncState(): void
+  markAllItemsAsNeedingSyncAndPersist(): Promise<void>
+  downloadFirstSync(waitTimeOnFailureMs: number, otherSyncOptions?: Partial<SyncOptions>): Promise<void>
+  persistPayloads(payloads: FullyFormedPayloadInterface[]): Promise<void>
+  lockSyncing(): void
+  unlockSyncing(): void
 }