feat: (experimental) .pointcloud drag and drop

fix: gracefully handles when saneurl is not present

refactor: reworked mouseover module
refactor: (dedup) moved click interceptor from nehuba/threesurfer to their common parent
refactor: move mouseover & viewer wrapper from viewercmp to two child components

maint: remove jsc in ci/cd

fix: schema generation
chore: gha checkout/setupnode

fix: dropped nii may have multiple dim
fix: showing dropped nii filename
fix: fix user layer message
chore: plotly loading bar
chore: helm deploy scripts

fix: highlight selected region in hierarchy
feat: on region select, close hierarchy
feat: point dialog closes dialog
fix: best viewpoints

fix: p/n shortcut updates pip

fix: selecting new pt asmt/reg while min

expmt: get related regions
maint: refactor

maint: siibra-api version

feat: allow fsaverage grid toggle
feat: allow feature download
maint: surface face selection disabled