Ability to enable / disable motion detection via MQTT (#3117)

* Starting working on adding motion toggle

* Add all info to mqtt command

* Send motion to correct funs

* Update mqtt docs

* Fixes for contingencies

* format

* mypy

* Tweak behavior

* Fix motion breaking frames

* Fix bad logic in detect set

* Always set value for motion boxes

frigate/video.py

@@ -361,6 +361,7 @@ def track_camera(
 
     frame_queue = process_info["frame_queue"]
     detection_enabled = process_info["detection_enabled"]
+    motion_enabled = process_info["motion_enabled"]
     improve_contrast_enabled = process_info["improve_contrast_enabled"]
 
     frame_shape = config.frame_shape
@@ -393,6 +394,7 @@ def track_camera(
         objects_to_track,
         object_filters,
         detection_enabled,
+        motion_enabled,
         stop_event,
     )
 
@@ -479,6 +481,7 @@ def process_frames(
     objects_to_track: list[str],
     object_filters,
     detection_enabled: mp.Value,
+    motion_enabled: mp.Value,
     stop_event,
     exit_on_empty: bool = False,
 ):
@@ -512,8 +515,8 @@ def process_frames(
             logger.info(f"{camera_name}: frame {frame_time} is not in memory store.")
             continue
 
-        # look for motion
-        motion_boxes = motion_detector.detect(frame)
+        # look for motion if enabled
+        motion_boxes = motion_detector.detect(frame) if motion_enabled.value else []
 
         regions = []