~jaro/balkon

ref: ddfeaa503aaca344bc22d438fef5af45f7e00463 balkon/test/Data/Text/ParagraphLayout/Internal/TreeSpec.hs -rw-r--r-- 4.3 KiB 
Consolidate tree types into one.

Add required textDirection to TextOptions.

Use ResolvedBox when flattening trees.