Add config flow to NMBS

source/_integrations/nmbs.markdown

@@ -3,6 +3,7 @@ title: NMBS
 description: Instructions on how to integrate timetable data for traveling on the NMBS/SNCB Belgian Railway within Home Assistant.
 ha_category:
   - Transport
+ha_config_flow: true
 ha_iot_class: Cloud Polling
 ha_release: 0.85
 ha_codeowners:
@@ -18,52 +19,7 @@ related:
 
 The `nmbs` {% term integration %} will create sensors for monitoring travel time and information between 2 stations.
 
-## Configuration
-
-To enable this {% 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: nmbs
-    station_from: "STATION_1"
-    station_to: "STATION_2"
-    station_live: "STATION_1"
-    exclude_vias: true
-```
-
-The stations can only be provided by their standard names and not ids. The list of stations can be checked on the NMBS/SNCB website but for most accurate results check them on the [iRail API page](https://api.irail.be/stations/) which this integration uses internally.
-
-{% configuration %}
-station_from:
-  description: The station where the connection departs.
-  required: true
-  type: string
-station_to:
-  description: The station where the connection arrives.
-  required: true
-  type: string
-station_live:
-  description: Setting this will create another sensor to monitor the liveboard in a station.
-  required: false
-  type: string
-exclude_vias:
-  description: Setting this will not show connections for which you have to transfer to another station.
-  required: false
-  type: boolean
-  default: false
-name:
-  description: Name to use in the frontend.
-  required: false
-  type: string
-  default: "`NMBS`, `NMBS Live` for the liveboard sensor when set."
-show_on_map:
-  description: Show the station on the map.
-  required: false
-  type: boolean
-  default: false
-{% endconfiguration %}
+{% include integrations/config_flow.md %}
 
 <p class='img'>
   <img src='/images/screenshots/nmbs-card-example.png' />