CPlantBox as a submodule for co-simulation

Summary

Add CPlantBox as a submodule for co-simulation in PASE.

Desired behavior

CPlantBox is a Functional Structural Plant Model that will generate dynamic plant models in the 3D scene and simulate physiological processes.

Sources

CPlantBox Github repo: https://github.com/Plant-Root-Soil-Interactions-Modelling/CPlantBox

Linked features or branches

n/a