Cosmodesi bgs project update

[SBouchard01]

Adding the BGS measurements scripts & Observables, along with some core changes:

• Moved the default Observables plots to the base Observable class, as they are quite data-independent
• Added get_abacus_phases method to read files from the AbacusSummit mocks and guess the available phases
• Added get_class_from_module function in utils (useful to get all the observables from an ac module ^^)
• Added plotting utils functions for visualizing parameter space distribution

Caution

If it's OK with you @epaillas I will also make a pass on the EMC observables to have a consistent behavior between the two projects after merging the conflicts from #102 (please merge #102 before this PR) - Some suggestions are done in #106

[SBouchard01]

Regarding the Observables aliases, I'd recommend importing the aliases only in __init__.py, and the full classes names from the files themselves to prevent confusion ? 🤔

e.g.

from acm.observables.emc import tpcf # this is the alias of the GalaxyCorrelationFunctionMultipoles class
from acm.observables.emc.tpcf import GalaxyCorrelationFunctionMultipoles # This is the exact class name
from acm.observables.emc import GalaxyCorrelationFunctionMultipoles # This will crash

Note

Ideally, we should prevent the files names and the aliases to have the same name to avoid confusion in the namespace 🤔 (e.g. acm.observables.tpcf should not include a tpcf alias

[SBouchard01]

In an attempt to reduce the review load on this PR, i've created several branches that will include the changes of this branch separately.
They should be merged in the following order :

• Fix dependencies  #112 (w/ issue Missing dependencies #71) - Fixes dependencies & imports in acm
• Remove deprecated components and enhance plotting utilities #117 (w/ issue Deprecate acm.utils.control_plots #81) - Moves several items from acm to sunbird (plots, model & priors)
• BGS Observables update #119 (w/ issue Update EMC Observables #106) - Upgrades BGS observables into EMC observables update #118
• EMC observables update #118 (w/ issue Update EMC Observables #106) - Upgrades EMC observables (you might need to update the scripts that call the observables after merging)

Note

This should cause a bunch of merge issue in this branch, but I'll solve them. Afterwards, the only remaining changes to cosmodesi will be the BGS scripts and some minimal utils functions.

Update

I have successfully reverted most of the changes of the PRs above from this PR, meaning that only remains in this PR the BGS-related changes needed to run the BGS scripts.
Note that the order of review and merging of the PRs above still remains valid, as some of it will impact (and probably overwrite) the content of this PR !

[epaillas]

Once you solve the conflicts feel free to merge

[epaillas]

Ready to merge?