Add Project env for miniapps

[luraess]

This PR adds a Project file in order to allow quick start running a JR miniapp example.

Todos (or maybe):

• Add CUDA?, MPI to env
• Add plotting packages to the env, CairoMakie or GLMakie
• Add note to the doc about how to get started with the miniapps
• anything else?

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[aelligp]

I would stay with GLMakie for now as Cairo doesn't like it when the cmin = cmax which happens during the plotting of the Shearbands

[aelligp]

Add GMG, ExactFieldSolutions (which then can be rm in the root project.toml).

[luraess]

Will do

[luraess]

I would stay with GLMakie for now as Cairo doesn't like it when the cmin = cmax which happens during the plotting of the Shearbands

I see, the one issue though with GLMakie is that it would fail when running on headless machines or servers where no OpenGL context is available. Isn't there a workaround for the shear band case? Else, we could also just add explicitly

import Pkg; Pkg.add("GLMakie"); using GLMakie

in the shear band case?

[albert-de-montserrat]

I guess we could add some random noise to the plots so that its not all the same values

[luraess]

I would stay with GLMakie for now as Cairo doesn't like it when the cmin = cmax which happens during the plotting of the Shearbands

This seems to work though with CairoMakie (v0.15.7):

using CairoMakie
heatmap(zeros(2,2))

[luraess]

I'll try to add a ref to it in the docs and then ask for review.