Created scene to view/update current key bindings.

- Current key bindings are shown on buttons
- Added button action events to store the clicked button
- Added key press event to entire pane
- Button text is updated to display its key
- Added functionality to keyFactory to update key bindings
- CSS styling for some components

#story[1197]

racevisionGame/src/main/java/visualiser/gameController/Keys/KeyFactory.java

@@ -48,4 +48,12 @@ public class KeyFactory {
         return keyState.get(key);
     }
 
+    public Map<String, ControlKey> getKeyState() {
+        return keyState;
+    }
+
+    public void updateKey(String oldKey, String newKey){
+        ControlKey controlKey = keyState.get(oldKey);
+        keyState.put(newKey, controlKey);
+    }
 }