Integrate ByteTracker and BoT-SORT trackers (#788)

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Co-authored-by: Glenn Jocher <glenn.jocher@ultralytics.com>
Co-authored-by: Ayush Chaurasia <ayush.chaurarsia@gmail.com>

ultralytics/tracker/README.md

@@ -0,0 +1,32 @@
+## Tracker
+
+### Trackers
+
+- [x] ByteTracker
+- [x] BoT-SORT
+
+### Usage
+
+python interface:
+
+```python
+from ultralytics import YOLO
+
+model = YOLO("yolov8n.pt")  # or a segmentation model .i.e yolov8n-seg.pt
+model.track(
+    source="video/streams",
+    stream=True,
+    tracker="botsort.yaml/bytetrack.yaml",
+    ...,
+)
+```
+
+cli:
+
+```bash
+yolo detect track source=... tracker=...
+yolo segment track source=... tracker=...
+```
+
+By default, trackers will use the configuration in `ultralytics/tracker/cfg`.
+We also support using a modified tracker config file. Please refer to the tracker config files in `ultralytics/tracker/cfg`.