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

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

docker/lerobot-cpu/Dockerfile

@@ -21,7 +21,7 @@ RUN echo "source /opt/venv/bin/activate" >> /root/.bashrc
 COPY . /lerobot
 WORKDIR /lerobot
 RUN pip install --upgrade --no-cache-dir pip
-RUN pip install --no-cache-dir ".[test, aloha, xarm, pusht]" \
+RUN pip install --no-cache-dir ".[test, aloha, xarm, pusht, koch]" \
     --extra-index-url https://download.pytorch.org/whl/cpu
 
 # Set EGL as the rendering backend for MuJoCo