feat(mobx): add sync back (do not look at the code)

src/mobx/interfaces/Migrate.ts

@@ -1,11 +0,0 @@
-import Store from "./Store";
-
-/**
- * A data store which is migrated forwards.
- */
-export default interface Migrate<K extends string> extends Store {
-    /**
-     * Migrate this data store.
-     */
-    migrate(key: K, data: Record<string, unknown>, rev: number): void;
-}

src/mobx/interfaces/Persistent.ts

@@ -13,5 +13,5 @@ export default interface Persistent<T> extends Store {
      * Hydrate this data store using given data.
      * @param data Given data
      */
-    hydrate(data: T): void;
+    hydrate(data: T, revision: number): void;
 }

src/mobx/interfaces/Syncable.ts

@@ -0,0 +1,9 @@
+import Store from "./Store";
+
+/**
+ * A data store which syncs data to Revolt.
+ */
+export default interface Syncable extends Store {
+    apply(key: string, data: unknown, revision: number): void;
+    toSyncable(): { [key: string]: object };
+}