Dynamic Management of Cameras (#18671)

* Add base class for global config updates

* Add or remove camera states

* Move camera process management to separate thread

* Move camera management fully to separate class

* Cleanup

* Stop camera processes when stop command is sent

* Start processes dynamically when needed

* Adjust

* Leave extra room in tracked object queue for two cameras

* Dynamically set extra config pieces

* Add some TODOs

* Fix type check

* Simplify config updates

* Improve typing

* Correctly handle indexed entries

* Cleanup

* Create out SHM

* Use ZMQ for signaling object detectoin is completed

* Get camera correctly created

* Cleanup for updating the cameras config

* Cleanup

* Don't enable audio if no cameras have audio transcription

* Use exact string so similar camera names don't interfere

* Add ability to update config via json body to config/set endpoint

Additionally, update the config in a single rather than multiple calls for each updated key

* fix autotracking calibration to support new config updater function

---------

Co-authored-by: Josh Hawkins <32435876+hawkeye217@users.noreply.github.com>

frigate/record/maintainer.py

@@ -75,7 +75,9 @@ class RecordingMaintainer(threading.Thread):
         # create communication for retained recordings
         self.requestor = InterProcessRequestor()
         self.config_subscriber = CameraConfigUpdateSubscriber(
-            self.config.cameras, [CameraConfigUpdateEnum.record]
+            self.config,
+            self.config.cameras,
+            [CameraConfigUpdateEnum.add, CameraConfigUpdateEnum.record],
         )
         self.detection_subscriber = DetectionSubscriber(DetectionTypeEnum.all)
         self.recordings_publisher = RecordingsDataPublisher(