Live classification model training (#18583)

* Implement model training via ZMQ and add model states to represent training

* Get model updates working

* Improve toasts and model state

* Clean up logging

* Add back in

frigate/types.py

@@ -21,6 +21,8 @@ class ModelStatusTypesEnum(str, Enum):
     downloading = "downloading"
     downloaded = "downloaded"
     error = "error"
+    training = "training"
+    complete = "complete"
 
 
 class TrackedObjectUpdateTypesEnum(str, Enum):