added hello world for testing

apps/apps.yaml

@@ -0,0 +1,3 @@
+hello_world:
+  module: hello
+  class: HelloWorld

apps/hello.py

@@ -0,0 +1,7 @@
+from appdaemon.plugins.hass.hassapi import Hass
+
+
+class HelloWorld(Hass):
+    def initialize(self):
+        # self.set_state(entity_id='input_boolean.enable', state='on')
+        self.log('Hello World')