chore: add usage instructions

Describes how to run the main program.

ref: N25B-168

README.md

@@ -4,6 +4,8 @@ The robot interface is a high-level API for controlling the robot. It implements
 
 This is an implementation for the Pepper robot, using the Pepper SDK and Python 2.7 as required by the SDK.
 
+
+
 ## Installation
 
 ### Linux (or WSL)
@@ -77,3 +79,12 @@ curl -OL https://community-static.aldebaran.com/resources/2.5.10/Python%20SDK/py
 ```
 
 Then resume the steps from above.
+
+
+
+## Usage
+
+```shell
+cd src
+python -m robot_interface.main
+```