Add real robot devices and scripts to control real robot (#288)

Co-authored-by: Simon Alibert <alibert.sim@gmail.com>

lerobot/common/robot_devices/motors/utils.py

@@ -0,0 +1,10 @@
+from typing import Protocol
+
+
+class MotorsBus(Protocol):
+    def motor_names(self): ...
+    def set_calibration(self): ...
+    def apply_calibration(self): ...
+    def revert_calibration(self): ...
+    def read(self): ...
+    def write(self): ...