feat: allow labelled nifti to be visualized

feat: freemode
feat: example proxy server
fix: dragndrop volume layout
maint: release script

fix: gracefully handles when saneurl is not present

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

chore: added prettierrc