Implement the Yang et al. model for SIDM density profiles

[abensonca]

The model of Yang et al. (2023) should be reasonably straightforward to implement in Galacticus. The integrals needed to account for mass accretion can be tracked as meta-properties by some new nodeOperator. Then we just need to implement the specific functional form of the density profile.

Initially their tidal truncation model could be ignored, leaving tidal effects to be handled in our usual way.