Add idb-keyval backed archival storage (#9754)

* Add idb-keyval backed archival storage

* Cleanup

* Remove test

src/storage/archive/schema.ts

@@ -0,0 +1,10 @@
+/**
+ * Data that's specific to the device and does not vary based account.
+ * Values here should be optional (since they may not have been saved
+ * yet), hence the `Partial`.
+ *
+ * See `#/storage/schema.ts` for examples.
+ */
+export type Device = Partial<{
+  // add values here
+}>