Implementation of corrections for projection effects

[inonchiu]

This PR adds support for projection effects in CROW, including a Costanzi-style projected richness model and an optional projection-induced lensing profile correction for stacked DeltaSigma predictions.

Main Changes:

• Added a new crow.cluster_modules.projection_effects module.
• Implemented CostanziBaseModel, CostanziBinned, and CostanziUnBinned for projected observed-richness probabilities.
• Added CostanziLensingBias / bsel for multiplicative selection-bias corrections to stacked DeltaSigma profiles.
• Extended binned recipes to optionally apply lensing profile corrections after stack integration.
• Added projection-effect grid construction and caching to GridBinnedClusterRecipe.
• Added a projection tutorial notebook: notebooks/run_projection.ipynb.
• Added and expanded tests for projection probabilities, projected counts, grid caching, and DeltaSigma correction behavior.

Implementation Notes:

• The richness projection model follows the Costanzi projection-effect formalism.
• The lensing profile correction is explicitly restricted to DeltaSigma predictions and raises an error for reduced shear.
• Radius conversion for the lensing correction is explicit: either comoving Mpc/h input or physical Mpc converted using reference redshift and h.