Abstract MQTT from communication and make mqtt optional (#4462)

* Add option for mqtt config

* Setup communication layer

* Have a dispatcher which is responsible for handling and sending messages

* Move mqtt to communication

* Separate ws communications module

* Make ws client conform to communicator

* Cleanup imports

* Migrate to new dispatcher

* Clean up

* Need to set topic prefix

* Remove references to mqtt in dispatcher

* Don't start mqtt until dispatcher is subscribed

* Cleanup

* Shorten package

* Formatting

* Remove unused

* Cleanup

* Rename mqtt to ws on web

* Fix ws mypy

* Fix mypy

* Reformat

* Cleanup if/else chain

* Catch bad set commands

frigate/config.py

@@ -60,6 +60,7 @@ class UIConfig(FrigateBaseModel):
 
 
 class MqttConfig(FrigateBaseModel):
+    enabled: bool = Field(title="Enable MQTT Communication.", default=True)
     host: str = Field(title="MQTT Host")
     port: int = Field(default=1883, title="MQTT Port")
     topic_prefix: str = Field(default="frigate", title="MQTT Topic Prefix")