Add notify platform to TTS (#14574)

Co-authored-by: Franck Nijhof <frenck@frenck.dev>

source/_integrations/notify.tts.markdown

@@ -0,0 +1,51 @@
+---
+title: "Notify using TTS"
+description: "Instructions on how to set up a Notify integration using TTS service and media_player within Home Assistant."
+ha_category:
+  - Notifications
+ha_release: 0.117
+ha_iot_class: Local Push
+ha_quality_scale: internal
+ha_domain: notify
+---
+
+The notify TTS platform lets you use the TTS integration [Service Say](/integrations/tts/#service-say) and a [media_player](/integrations/media_player) to alert you of important events. This integration provides a simple interface to use in your automations and alerts.
+
+In order to use this integration, you must already have a TTS platform installed and configured, and a media_player working with the TTS platform.
+
+To enable this platform in your installation, consider the following example using [google_translate](/integrations/google_translate/) and an example `media_player.living_room`. 
+
+In your `configuration.yaml` file type:
+
+```yaml
+tts:
+  - platform: google_translate
+    service_name: google_say
+
+notify:
+  - platform: tts
+    name: in_the_living_room
+    tts_service: tts.google_say
+    media_player: media_player.living_room
+```
+
+Please note that the `tts_service` parameter, must match the `service_name` defined in the TTS integration.
+
+{% configuration %}
+  name:
+    description: The name of the notify service.
+    required: true
+    type: string
+  tts_service:
+    description: "The `service_name` of a TTS platform."
+    required: true
+    type: string
+  media_player:
+    description: "The `entity_id` of a media_player."
+    required: true
+    type: string
+  language:
+    description: "The `language` to be passed to the TTS `Service Say`"
+    required: false
+    type: string
+{% endconfiguration %}