Update lupusec documentation for config flow (#31014)

* Update lupusec documentation for config flow

* Removed legacy configuration, fixed yaml

* Removed redundant configuration title

source/_integrations/lupusec.markdown

@@ -10,6 +10,7 @@ ha_release: 0.83
 ha_iot_class: Local Polling
 ha_codeowners:
   - '@majuss'
+  - '@suaveolent'
 ha_domain: lupusec
 ha_platforms:
   - alarm_control_panel
@@ -24,6 +25,7 @@ Supported units:
 
 - Lupusec XT1
 - Lupusec XT2 Plus
+- Lupusec XT3 Plus
 
 The following devices are supported by the underlying `lupupy` Python library and integrated into Home Assistant.
 
@@ -31,33 +33,4 @@ The following devices are supported by the underlying `lupupy` Python library an
 - **Binary sensor**: Displays the status of binary sensors. Door, window, water, and smoke sensors are supported.
 - **Switch**: Turn off and on your Lupus power switches.
 
-## Configuration
+{% include integrations/config_flow.md %}
-
-To use Lupusec devices in your installation, add the following `lupusec` section to your `configuration.yaml` file:
-
-```yaml
-# Example configuration.yaml entry
-lupusec:
-  username: YOUR_USERNAME
-  password: YOUR_PASSWORD
-  ip_address: YOUR_IP_ADDRESS
-```
-
-{% configuration %}
-username:
-  description: The login username of your Lupusec alarm panel.
-  required: true
-  type: string
-password:
-  description: The login password of your Lupusec alarm panel.
-  required: true
-  type: string
-ip_address:
-  description: The IP address of your Lupusec alarm panel.
-  required: true
-  type: string
-name:
-  description: Name for your Lupusec panel.
-  required: false
-  type: string
-{% endconfiguration %}