Add catalogs to model

Add original catalog used to build gridded seismicity sources along with declustered versions.

added 2023 ERF labels

changed milestone to %Finalize 2023 NSHM and ongoing GMM work

removed milestone %Finalize 2023 NSHM and ongoing GMM work

@pmpowers - The data release for Alaska 2023 contains 17 catalog files: raw catalog, deduplicated catalog, and, for each declustering method, a declustered catalog, a declustered catalog with moment tensors, and three segregated catalogs (crustal, interface, slab). Which of these files should be added here? Should a README documenting processing steps and columns also be included?