Dem insertion from file

[OGaboriault]

Description of the problem

• Particle insertion can take a lot of time. Currently, it's not possible to change the triangulation being used before and after a restart. If it was possible to load particle with a certain triangulation (ex. enabling bigger insertion boxes and smaller cells) and running the rest of the simulation with the real triangulation, this could possibly save a lot of time.

Description of the solution

This PR adds the from_file insertion method. It's really similar to what has been done in the CFD-DEM Resolve solver. Basically, particles properties are stored in a text file. Each line is associated with a particle and each columns to a kind of properties.

It's basically the same thing as the list insertion but without the limitation from the number of character on a single line.

I've also include a python code to extract the properties of the last vtu of a simulation.

How Has This Been Tested?

• I ran one of my pp_jkr application test to see if the result was affected by this method, which is not the case.
• I also extracted the properties of all the particles from one of my LPBF simulations. (1.2 million to be exact) and it worked. It took about 20 seconds.

Documentation

• Insertion section.

[blaisb]

I am good with it so @acdaigneault if you are good I think this is ready for merge I'll wait for your OK :)

[blaisb]

@OGaboriault some parameter files need to be updated I think