Merge 'simple README with warning' from Nikita Sivukhin

Closes #2562

packages/turso-sync-js/README.md

@@ -1 +1,33 @@
 # turso-sync-js package
+
+> [!WARNING]
+> **`@tursodatabase/sync`** is in a **very experimental** stage.
+> It may cause **data corruption** in **both local and remote databases**.
+>
+> We are actively working to make it a **production-grade** package, but **it is not safe for critical data yet**.
+
+## Usage
+
+[![npm version](https://img.shields.io/npm/v/@tursodatabase/sync)](https://www.npmjs.com/package/@tursodatabase/sync)
+
+```
+npm i @tursodatabase/sync
+```
+
+Example usage with remote DB hosting at [Turso Cloud](https://turso.tech)
+
+```js
+import { connect } from '@tursodatabase/sync';
+
+const db = await connect({
+    path: 'local.db',                // path used as a prefix for local files created by sync-engine
+    url: 'https://<db>.turso.io',    // URL of the remote database: turso db show <db>
+    authToken: '...',                // auth token issued from the Turso Cloud: turso db tokens create <db>
+    clientName: 'turso-sync-example' // arbitrary client name
+});
+
+// db has same functions as Database class from @tursodatabase/database package but adds few more methods for sync:
+await db.pull(); // pull changes from the remote
+await db.push(); // push changes to the remote
+await db.sync(); // pull & push changes
+```