Add config flow to One-Time Password (OTP) integration (#33031)

source/_integrations/otp.markdown

@@ -10,6 +10,7 @@ ha_quality_scale: internal
 ha_domain: otp
 ha_platforms:
   - sensor
+ha_config_flow: true
 ha_integration_type: integration
 related:
   - docs: /docs/configuration/
@@ -18,29 +19,7 @@ related:
 
 The `otp` {% term integration %} generates One-Time Passwords according to [RFC6238](https://tools.ietf.org/html/rfc6238) that is compatible with most OTP generators available, including Google Authenticator. You can use this when building custom security solutions and want to use "rolling codes", that change every 30 seconds.
 
-## Configuration
-
-To enable the OTP {% term integration %}, add the following lines to your {% term "`configuration.yaml`" %} file.
-{% include integrations/restart_ha_after_config_inclusion.md %}
-
-```yaml
-# Example configuration.yaml entry
-sensor:
-  - platform: otp
-    token: SHARED_SECRET_TOKEN
-```
-
-{% configuration %}
-name:
-  description: Name of the sensor to use in the frontend.
-  required: false
-  default: OTP Sensor
-  type: string
-token:
-  description: The shared secret you use in your OTP generator (e.g., Google Authenticator on your phone).
-  required: true
-  type: string
-{% endconfiguration %}
+{% include integrations/config_flow.md %}
 
 ## Generating a token