added call out unsupported features

Author: soheimam

docs/mini-apps/troubleshooting/base-app-compatibility.mdx

@@ -22,6 +22,7 @@ Future notification features will not require code changes to your Mini App.
 
 - signManifest(experimental)
 
+To use unsupported features, you can use the `context` object to detect if the app is running in the Base App.
 
 ## Base App Client Detection
 To detect if the app is running in the Base App, you can use the `clientFid` property of the `context` object.