docs: add user consent section

README.md

@@ -255,6 +255,18 @@ for await (const message of await xmtp.conversations.streamAllMessages()) {
 }
 ```
 
+## Request and respect user consent
+
+![Feature status](https://img.shields.io/badge/Feature_status-Alpha-orange)
+
+The user consent feature enables your app to request and respect user consent preferences. With this feature, a blockchain account address registered on the XMTP network can have one of three consent preference values:
+
+- Unknown
+- Allowed
+- Denied
+
+To learn more, see [Request and respect user consent](https://xmtp.org/docs/build/user-consent).
+
 ## Check if an address is on the network
 
 If you would like to check and see if a blockchain address is registered on the network before instantiating a client instance, you can use `Client.canMessage`.