Add config flow to Moon (#21855)

source/_integrations/moon.markdown

@@ -11,22 +11,23 @@ ha_codeowners:
 ha_domain: moon
 ha_platforms:
   - sensor
+ha_config_flow: true
 ---
 
-The `moon` integration tracks the phases of the moon.
+The Moon integration tracks the phases of the moon.
 
-## Configuration
+{% include integrations/config_flow.md %}
 
-To enable the moon sensor, add the following lines to your `configuration.yaml`:
+The sensor provided by this integration will return one of the following values:
 
-```yaml
-# Example configuration.yaml entry
-sensor:
-  - platform: moon
-```
-
-This sensor will return one of the following values:
-`new_moon`, `waxing_crescent`, `first_quarter`, `waxing_gibbous`, `full_moon`, `waning_gibbous`, `last_quarter` or `waning_crescent` .
+- `new_moon`
+- `waxing_crescent`
+- `first_quarter`
+- `waxing_gibbous`
+- `full_moon`
+- `waning_gibbous`
+- `last_quarter`
+- `waning_crescent`
 
 <p class='img'>
 <img src='/images/screenshots/more-info-dialog-moon.png' />