Beta release of CONUS NSHM

Finish up outstanding additions to model and code and, to the extent possible, improve unit tests.

Unstarted Issues (open and unassigned)

Ongoing Issues (open and assigned)

Completed Issues (closed)

nshmp-lib · Modify CPA and NGA-East adjustments to be gmm-tree branches
#192 2023 GMM
nshmp-lib · Review KBCG20 and PSBAH20 Seattle M9 basin flavors and flags
#191 2023 GMM
nshm-conus · Fix NGA-Subduction logic tree
#36
nshmp-lib · Add Cybershake modifications to other NGA-West2 GMMs
#189 2023 GMM
nshm-conus · Update Cascadia intraslab depths to SLAB2
#30 2023 ERF To Do
nshmp-lib · Add support for interface gridded seismicity model
#180 2023 ERF
nshmp-lib · Tests for region-specific GMM behavior
#176 2023 GMM
nshm-conus · Update CEUS grid sources
#25 2023 ERF
nshm-conus · Update Cascadia
#23 2023 ERF
nshm-conus · Tapered GR regression WUS gridded seismicity sources
#4 ERF