system: add help texts

python_payload/apps/demo_scroll/__init__.py

@@ -18,6 +18,8 @@ class ScrollDemo(Application):
 
     def __init__(self, app_ctx: ApplicationContext) -> None:
         super().__init__(app_ctx)
+        # this class is deprecated, please don't use it for new apps
+        # check out st3m.ui.widgets.Scroller instead!
         self.scroll = CapScrollController()
 
     def draw(self, ctx: Context) -> None: