add deprecation notices for rabbitmq integration (#5862)

docs/eventing/brokers/broker-types/README.md

@@ -20,5 +20,7 @@ This Broker implementation uses [Apache Kafka](https://kafka.apache.org/) as its
 
 ### RabbitMQ broker
 
+⚠️ The component is deprecated and will no longer be shipped in future releases. For a timeline see: https://github.com/knative/eventing/issues/7670
+
 The RabbitMQ Broker uses [RabbitMQ](https://www.rabbitmq.com/) for its underlying implementation.
 For more information, see [RabbitMQ Broker](./rabbitmq-broker/README.md) or [the docs available on GitHub](https://github.com/knative-extensions/eventing-rabbitmq).

docs/eventing/brokers/broker-types/rabbitmq-broker/README.md

@@ -1,5 +1,7 @@
 # Creating a RabbitMQ Broker
 
+⚠️ The component is deprecated and will no longer be shipped in future releases. For a timeline see: https://github.com/knative/eventing/issues/7670
+
 This topic describes how to create a RabbitMQ Broker.
 
 ## Prerequisites

docs/eventing/sources/rabbitmq-source/README.md

@@ -1,5 +1,7 @@
 # Creating a RabbitMQSource
 
+⚠️ The component is deprecated and will no longer be shipped in future releases. For a timeline see: https://github.com/knative/eventing/issues/7670
+
 ![stage](https://img.shields.io/badge/Stage-stable-green?style=flat-square)
 ![version](https://img.shields.io/badge/API_Version-v1alpha1-red?style=flat-square)
 

docs/install/yaml-install/eventing/install-eventing-with-yaml.md

@@ -202,6 +202,8 @@ Follow the procedure for the Broker of your choice:
 
 === "RabbitMQ Broker"
 
+    ⚠️ The component is deprecated and will no longer be shipped in future releases. For a timeline see: https://github.com/knative/eventing/issues/7670
+
     * Install the RabbitMQ Broker by following the instructions in the
     [RabbitMQ Knative Eventing Broker README](https://github.com/knative-extensions/eventing-rabbitmq/tree/main/broker).