Add scene apply docs (#10657)

* Add scene apply docs

* Fix lint

* Fix formatting

source/_integrations/scene.markdown

@@ -50,14 +50,41 @@ Scenes can be activated using the service `scene.turn_on` (there is no 'scene.tu
 
 ```yaml
 # Example automation
-...
 automation:
   trigger:
     platform: state
     entity_id: device_tracker.sweetheart
-    from: 'not_home'
+    from: "not_home"
-    to: 'home'
+    to: "home"
   action:
     service: scene.turn_on
     entity_id: scene.romantic
 ```
+
+## Applying a scene without defining it
+
+With the `scene.apply` service you are able to apply a scene without first defining it via configuration. Instead, you pass the states as part of the service data. The format of the data is the same as the `entities` field in a configuration.
+
+```yaml
+# Example automation
+automation:
+  trigger:
+    platform: state
+    entity_id: device_tracker.sweetheart
+    from: "not_home"
+    to: "home"
+  action:
+    service: scene.apply
+    data:
+      entities:
+        light.tv_back_light:
+          state: on
+          brightness: 100
+        light.ceiling: off
+        media_player.sony_bravia_tv:
+          source: HDMI 1
+```
+
+## Reloading scenes
+
+Whenever you make a change to your scene configuration, you can call the `scene.reload` service to reload the scenes.