~jaro/balkon

ref: 0680c59bcaa7239488d49b6bc9ed0aa8ae0ec3b4 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.