Add clarifying code comments and improve README

src/__init__.py

@@ -1,7 +1,7 @@
 """
 This file registers the model with the Python SDK.
 """
-
+# usage of camera type is arbitrary; refactor to your desired component/service
 from viam.components.camera import Camera
 from viam.resource.registry import Registry, ResourceCreatorRegistration
 

src/main.py

@@ -1,5 +1,6 @@
 import asyncio
 
+# usage of camera type is arbitrary; refactor to your desired component/service
 from viam.components.camera import Camera
 from viam.logging import getLogger
 from viam.module.module import Module

src/module.py

@@ -15,7 +15,7 @@ from viam.resource.types import Model, ModelFamily
 
 LOGGER = getLogger(__name__)
 
-
+# usage of camera type is arbitrary; refactor to your desired component/service
 class MyModule(Camera, Reconfigurable):  # use a better name than this
     """
     Camera represents any physical hardware that can capture frames.