Feature: improve examples

As the title states.

This changes the example runner to open the examples instead of running them.

Additionally, this MR adds a dummy call to the server on connect any catches any connection error. Thus we can now print a message if the connection to the server failed.

scripts/templates/wrapper.py.j2

@@ -61,6 +61,14 @@ class VAInterface:
         self._event_thread = Thread(target=background_event_tread, args=(self._loop,) , daemon=True)
         self._event_thread.start()
 
+        try:
+            self._get_state()
+        except ConnectionError as e:
+            print(f"Could not connect to VA server. Error: {e}")
+            print("Please make sure the VA server is running and accessible.")
+            self.disconnect()
+            exit(1)
+
         self._connected = True
 
         if add_event_handling: