Update fritz for config flow (#17561)

source/_integrations/fritz.markdown

@@ -5,6 +5,12 @@ ha_category:
   - Presence Detection
 ha_release: '0.10'
 ha_domain: fritz
+ha_zeroconf: true
+ha_config_flow: true
+ha_codeowners:
+  - '@mammuth'
+  - '@AaronDavidSchneider'
+  - '@chemelli74'
 ha_iot_class: Local Polling
 ha_platforms:
   - device_tracker
@@ -12,32 +18,7 @@ ha_platforms:
 
 The `fritz` platform offers presence detection by looking at connected devices to a [AVM FRITZ!Box](https://avm.de/produkte/fritzbox/) based router.
 
-## Configuration
+{% include integrations/config_flow.md %}
-
-To use an FRITZ!Box router in your installation, add the following to your `configuration.yaml` file:
-
-```yaml
-# Example configuration.yaml entry
-device_tracker:
-  - platform: fritz
-```
-
-{% configuration %}
-host:
-  description: The IP address of your router, e.g., `192.168.178.1`. It is optional since every FRITZ!Box is also reachable by using the IP address 169.254.1.1.
-  required: false
-  type: string
-  default: 169.254.1.1
-username:
-  description: The username of an user with administrative privileges, usually `admin`.
-  required: false
-  type: string
-  default: admin
-password:
-  description: The password for your given admin account.
-  required: false
-  type: string
-{% endconfiguration %}
 
 <div class='note'>
 TR-064 needs to be enabled in the FRITZ!Box network settings for Home Assistant to login and read device info.