Added Mocks to help aid the process of creation of the textual TUI

src/pilgrim/ui/ui.py

@@ -0,0 +1,9 @@
+from textual.app import App
+
+from pilgrim.service.servicemanager import ServiceManager
+
+
+class UIApp(App):
+    def __init__(self,service_manager: ServiceManager):
+        super().__init__()
+        self.service_manager = service_manager