Added note

readme.md

@@ -1,12 +1,17 @@
 # ZenFS Emscripten Backend
 
+> [!WARNING]
+> This package has not been extensively tested and may not be stable.
+>
+> If you find a bug, please report it. Thanks!
+
 [ZenFS](https://github.com/zen-fs/core) backend for usage with Emscripten.
 
+For more information, see the [docs](https://zen-fs.github.io/emscripten).
+
 > [!IMPORTANT]
 > Please read the ZenFS core documentation!
 
-For more information, see the [docs](https://zen-fs.github.io/emscripten).
-
 ## Installing
 
 ```sh