docs: clarify that its currently alpha.

Author: thruflo

README.md

@@ -13,6 +13,8 @@ TanStack DB extends TanStack Query with collections, live queries and transactio
     <img alt="" src="https://img.shields.io/badge/Discord-TanStack-%235865F2" /></a>
   <a href="https://npmjs.com/package/@tanstack/db">
     <img alt="" src="https://img.shields.io/npm/dm/@tanstack/db.svg" /></a>
+  <a href="#status">
+    <img src="https://img.shields.io/badge/status-alpha-orange" alt="Status - Alpha"></a>
   <a href="https://github.com/tanstack/db/discussions">
     <img alt="Join the discussion on Github" src="https://img.shields.io/badge/Discussions-Chat%20now!-green" /></a>
   <a href="https://x.com/tan_stack">
@@ -199,6 +201,10 @@ No. TanStack DB is not an ORM. Queries run entirely in the client against local
   />
 </a>
 
+## Status
+
+Tanstack DB is currently an early preview release in alpha. It's still under active development. There will be bugs and the APIs are still liable to change.
+
 ## Contributing
 
 View the contributing guidelines [here](https://github.com/TanStack/query/blob/main/CONTRIBUTING.md).