add symbols

[Clare72]

some of these should probably have symbols

WHERE s.short_form = "neuprint_JRC_Hemibrain_1point1" 
WITH i,collect(type.symbol[0])+collect(supertype.symbol[0]) as type_supertype_symbols, collect(distinct type.label) as fbbt_types
WHERE not type_supertype_symbols
RETURN distinct fbbt_types```