Add support for buttons

Closes #94

Author: shmuelzon

src/com/shmuelzon/HomeAssistantFloorPlan/Controller.java

@@ -442,11 +442,13 @@ private Map<HomeLight, Float> getLightsPower(Map<String, List<HomeLight>> lights
     private boolean isHomeAssistantEntity(String name) {
         String[] sensorPrefixes = {
             "binary_sensor.",
+            "button.",
             "camera.",
             "climate.",
             "cover.",
             "fan.",
             "input_boolean.",
+            "input_button.",
             "lock.",
             "media_player.",
             "sensor.",
@@ -822,6 +824,7 @@ private void generateLightEntities(Map<String, Entity> homeAssistantEntities) {
 
     private boolean isHomeAssistantEntityActionable(String name) {
         String[] actionableEntityPrefixes = {
+            "button.",
             "cover.",
             "fan.",
             "lock.",