feat: allow toggling of octant removal when landmarks shown

chore: refactor nehuba navigation service

bugfix: e2e non atlas volumes
chore: misc fixes

feat: interactiveViewer.viewerHandle.mouseOverNehubaUI now allows ...
... customLandmarks enter/leave state to be monitored

* feat: use region related components inherit randomized colour
bugfix: Explore btn text colour
chore: reworked threshold for triggering darkmode

* feat: reworked contributor name display

* chore: use short name for version selector

* chore: update help page info

chore: added test to prevent regression

bugfix: mouseOver directive not capturing scanning region properly
feat: reworked region menu component
feat: introduced landmark component
chore: reworked spatial search endpoint

chore: use fullId for regions

bugfix: style display
bugfix: precision

chore: unitifed store export

chore: ui fixes
chore: remove unused ui
bugfix on directives

instead of segment name

feat: region selection

bugfix: hover segment info not working for segmentId > 65500
bugfix: dbl click on viewer not working for segId > 65500