maint: added css to vanilla.html

minor refactor

TODO:

- annotation
- real space not yet available
- nehuba status panel busted
- check swc works

generally working with the following caveats:

- fsaverage busted
- annotation not yet working
- colin27 busted
- real space interpolation values not yet available
- (as a result of above) nehuba status panel not yet working

ALSO TO CHECK:
- swc

maint: toggle parc visib

... persistence)
maint: added markdown descriptor for slice view quick starter guide
fix: fixed neuron messing, passing message to api service if not found
fix: api method typos

maint: external precomputed layer now fetches and sets transform

feat: allow point assmnt result export as CSV

map not properly displayed

multiple variant meshes
bugfix: fsaverage err URL encoding selected
regions
maint: some simplification

chore: introduce min width for smart chip
feat: improve perf mesh loading
fix: reset panel mode/panel order

fix: atlas order
fix: parcellation/space short names
chore: added parcellation name to region banner
chore: removed parcellation name from  feature banner
ui: reintroduced badge, move num of entity to badge
fix: show connectivity only in human, only on jba29
feat: always show ng layer ctrl on voi
chore: do not show Unknown category
fix: pip style
chore: select jba3 by default over jba29
fix: pip minimap is not updated on new template

bugfix: add explore in kg for ebrains features
bugfix: url encoding of ebrains data features
chore: fix typo

chore: add is group pipe guard
feat: add veil to readmore component
chore: reworked how voi is shown
bugfix: getParcNgId properly returns null if region is null'ish

bugfix: annotation mode works again