refactor(dev-only): import tools (#2121)

packages/ui-services/src/Import/Importer.ts

@@ -0,0 +1,14 @@
+import { WebApplicationInterface } from '@standardnotes/services'
+import { DecryptedTransferPayload } from '@standardnotes/snjs'
+
+export class Importer {
+  constructor(protected application: WebApplicationInterface) {}
+
+  async importFromTransferPayloads(payloads: DecryptedTransferPayload[]): Promise<void> {
+    for (const payload of payloads) {
+      const itemPayload = this.application.items.createPayloadFromObject(payload)
+      const item = this.application.items.createItemFromPayload(itemPayload)
+      await this.application.mutator.insertItem(item)
+    }
+  }
+}