Add google translate config flow (#27886)

source/_integrations/google_translate.markdown

@@ -8,36 +8,16 @@ ha_iot_class: Cloud Push
 ha_domain: google_translate
 ha_platforms:
   - tts
+ha_config_flow: true
 ha_integration_type: integration
 ---
 
 The `google_translate` text-to-speech platform uses the unofficial [Google Translate text-to-speech engine](https://translate.google.com/) to read a text with natural sounding voices. Contrary to what the name suggests, the integration only does text-to-speech and does not translate messages sent to it.
 
-## Configuration
-
-To enable text-to-speech with Google, add the following lines to your `configuration.yaml`:
-
-```yaml
-# Example configuration.yaml entry
-tts:
-  - platform: google_translate
-```
-
-{% configuration %}
-language:
-  description: "The default speech language to use."
-  required: false
-  type: string
-  default: "`en`"
-tld:
-  description: "The default Google domain you want to use to choose dialect."
-  required: false
-  type: string
-  default: "`com`"
-{% endconfiguration %}
+{% include integrations/config_flow.md %}
 
 Check the [complete list of supported languages](https://translate.google.com/intl/en_ALL/about/languages/) (languages where "Talk" feature is enabled in Google Translate) for allowed values.
-Use the 2-digit language code which you can find at the end of the URL when you click on the language name. 
+Use the 2-digit language code which you can find at the end of the URL when you click on the language name.
 
 Check the [complete list of supported tld](https://www.google.com/supported_domains) for allowed TLD values. This is used to force the dialect used when multiple fall into the same 2-digit language code(i.e., *US, UK, AU*)
 
@@ -60,21 +40,14 @@ You can also use supported BCP 47 tags like the below or the 2-2 digit format fo
 |es-es|es|es|
 |es-us|es|com|
 
-
-## Full configuration example
-
-A full configuration sample including optional variables:
-
-```yaml
-# Example configuration.yaml entry
-tts:
-  - platform: google_translate
-    language: "de"
-    tld: com
-```
-
 ## Service say
 
+<div class='note'>
+
+The `google_translate_say` service can be used when configuring the legacy `google_translate` text-to-speech platform in `configuration.yaml`. We recommend new users to instead set up the integration in the UI and use the `tts.speak` service with the corresponding Google Translate text-to-speech entity as target.
+
+</div>
+
 The `google_translate_say` service supports `language` and also `options` for setting `tld`. The text for speech is set with `message`. Since release 0.92, the service name can be defined in the configuration `service_name` option.
 
 Say to all `media_player` device entities:
@@ -123,7 +96,7 @@ data:
   message: "May the force be with you."
   language: "en"
   options:
-    tld: co.uk  
+    tld: co.uk
 ```
 
 With a template: