feat(#2415): create combined highlight groups

Author: alex-courtis

lua/nvim-tree/renderer/builder.lua

@@ -77,9 +77,9 @@ function Builder:configure_group_name_modifier(group_name_modifier)
 end
 
 --- Insert ranged highlight groups into self.highlights
---- @param groups string[]
---- @param start number
---- @param end_ number|nil
+---@param groups string[]
+---@param start number
+---@param end_ number|nil
 function Builder:_insert_highlight(groups, start, end_)
   table.insert(self.highlights, { groups, self.index, start, end_ or -1 })
 end