Add SZ likelihood

[emilymmoser]

We plan to add an SZ likelihood to forward-model theoretical gas density and pressure into kSZ and tSZ profiles. There is an existing repository Mop-c-GT (Model-to-observable projection code for galaxy thermodynamics, https://github.com/timothydmorton/Mop-c-GT) used in Schaan et al. 2021 (https://ui.adsabs.harvard.edu/abs/2021PhRvD.103f3513S/abstract) and Amodeo et al. 2021 (https://ui.adsabs.harvard.edu/abs/2021PhRvD.103f3514A/abstract) performing line-of-sight projection along with beam convolution and aperture photometry for ACT data that we propose to integrate with the SO framework to be able to make similar predictions.

A few example figures are included below, with the theoretical curves in the left panels and the projected SZ profiles in the right panels. These are simply example gNFW curves to show the process, they do not show real data.