refactor(cameras): improvements opencv cam v0.1

tests/cameras/test_opencv.py

@@ -0,0 +1,13 @@
+# from lerobot.common.cameras.opencv import OpenCVCamera, OpenCVCameraConfig
+
+
+# class TestCameras(unittest.TestCase):
+# # NOTE(Steven): Independent test func
+# def test_connect():
+#     config = OpenCVCameraConfig(camera_id=0)
+#     camera = OpenCVCamera(config)
+#     camera.connect()
+#     assert camera.is_connected
+
+
+# # 1. Refactor -> opencv , write some test , think about realsese, iterate