Plot-system-V2

[VForiel]

This PR add a better plot system in the sandbox dedicated datapack.

This new plot system is only asking to define:

• X limits
• resolution (number of points)
• plot origine (X, Y and Z)
• plot size (X, Y and Z)

Interpolations are made to assigne an X value to each entity and scale the Y range in function of the results. Create a plot can then be performed in few simples commandes (see bs.plot:sqrt)