docs: add access policy middleware

README.md

@@ -74,6 +74,9 @@ It's designed to be straightforward and efficient, offering a rich set of featur
 - **Authentication Middleware**
   - Support for **JWT** with client authorization based on request results.
   - **Basic-Auth** and **OAuth** authentication mechanisms.
+- **Access Policy Middleware**
+
+   The Access Policy middleware controls route access by either `allowing` or `denying` requests based on defined rules.
 
 ### Monitoring and Performance
 - **Logging**