Build a module for testing ltu-cmass against existing n-body simulations

[maho3]

In the Go Big Simulations paper, we want to compare our ltu-cmass forward evaluations against existing, high-res N-body simulations. As described in the Planning Document, we have access to:

• 1 Gpc/h Quijote latin_hypercube_HR and Sobol sequence Halos
• 2 Gpc/h AbacusSummit emulator_grid Halos
• 2 Gpc/h MTNG L-galaxies Galaxy lightcone
• 3 Gpc/h OuterRim halos

The goal for this task would be to construct a series of scripts and notebooks which compare the statistical properties of the ltu-cmass outputs against these N-body sims. It should compare the catalogs at different stages of the pipeline, including:

• Comoving halos
• Comoving galaxies (+HOD)
• Survey-space
• Inference level (i.e. validation with ltu-ili)

[maho3]

Also, include PQMass as a metric of dataset shift ?

[maho3]