move sync & persistence engine over to own matrix folder

src/main.js

@@ -1,7 +1,7 @@
-import HomeServerApi from "./hs-api.js";
-import Session from "./session.js";
-import createIdbStorage from "./storage/idb/create.js";
-import Sync from "./sync.js";
+import HomeServerApi from "./matrix/hs-api.js";
+import Session from "./matrix/session.js";
+import createIdbStorage from "./matrix/storage/idb/create.js";
+import Sync from "./matrix/sync.js";
 
 const HOST = "localhost";
 const HOMESERVER = `http://${HOST}:8008`;

src/matrix/sync.js

@@ -3,7 +3,7 @@ import {
 	HomeServerError,
 	StorageError
 } from "./error.js";
-import EventEmitter from "./event-emitter.js";
+import EventEmitter from "../event-emitter.js";
 
 const INCREMENTAL_TIMEOUT = 30000;
 const SYNC_EVENT_LIMIT = 10;