Matlab Emio Communicaiton

[AlessandriniAntoine]

adds a Matlab/Simulink TP extensions to _depthcamera.py required to support it.

Changes to _depthcamera.py

• Raw camera coordinates: added access to unprocessed tracker coordinates from the camera frame, used for the front-facing camera mode without noise introduced by post-processing.
• Frame split: separated get_frame() and process_frame() into two distinct calls, allowing synchronization via multiprocessing events between the camera and motor control processes.

New: examples/matlab/

A complete Python/Simulink bridge for a compliant robotics TP:

• UDP communication between Python and Simulink (clock-master pattern)
• Python multiprocessing work:
  • Camera-based marker tracking (top and front modes)
  • Motor control loop synchronized with the camera process
  • Configurable via a single params.py file
• Includes a hardware-free test script

[HanaeRateau]

We won't merge this PR but we will integrate the UDP server #39, and we created a repo with a minimal the matlab example https://github.com/SofaComplianceRobotics/MatlabxEmio.
We will also created another repo with a the full matlab.