Add Apache Kafka docs (#9836)

* Add Apache Kafka docs

* :penil2: Cleaned up front matter

source/_components/apache_kafka.markdown

@@ -0,0 +1,60 @@
+---
+title: "Apache Kafka"
+description: "Send data and events to Apache Kafka."
+logo: apache_kafka.png
+ha_category:
+  - History
+ha_release: 0.97
+---
+
+The `apache_kafka` integration sends all state changes to a
+[Apache Kafka](https://kafka.apache.org/) topic.
+
+Apache Kafka is a real-time data pipeline that can read and write streams of data. It
+stores its data safely in a distributed, replicated, fault-tolerant cluster.
+
+To use the `apache_kafka` integration in your installation, add the following to your
+`configuration.yaml` file:
+
+```yaml
+apache_kafka:
+  ip_address: localhost
+  port: 9092
+  topic: home_assistant_1
+```
+
+{% configuration %}
+host:
+  description: The IP address or hostname of an Apache Kafka cluster.
+  required: true
+  type: string
+port:
+  description: The port to use.
+  required: true
+  type: integer
+topic:
+  description: The Kafka topic to send data to.
+  required: true
+  type: string
+filter:
+  description: Filters for entities to be included/excluded.
+  required: false
+  type: map
+  keys:
+    include_domains:
+      description: Domains to be included.
+      required: false
+      type: list
+    include_entities:
+      description: Entities to be included.
+      required: false
+      type: list
+    exclude_domains:
+      description: Domains to be excluded.
+      required: false
+      type: list
+    exclude_entities:
+      description: Entities to be excluded.
+      required: false
+      type: list
+{% endconfiguration %}