~jaro/balkon

ref: 397a9e427f251005c29846c94299ef5d6467d352 balkon/test/Data/Text/ParagraphLayout/Internal/BiDiLevelsSpec.hs -rw-r--r-- 3.0 KiB 
Improve BiDi handling of numbers and neutrals.

Add tests for mixed text direction.

Convert legacy span directions into levels.