Add feature history map (#12506)

source/_lovelace/map.markdown

@@ -42,6 +42,11 @@ dark_mode:
   description: Enable a dark theme for the map.
   type: boolean
   default: false
+hours_to_show:
+  required: false
+  description: Shows a path of previous locations. Hours to show as path on the map.
+  type: integer
+  default: 0
 {% endconfiguration %}
 
 <div class='note'>
@@ -74,3 +79,10 @@ geo_location_sources:
 entities:
   - zone.home
 ```
+
+```yaml
+type: map
+entities:
+  - device_tracker.demo_paulus
+hours_to_show: 48
+```