~jaro/balkon

ref: 04fdd17a9811ee19b7ab9537b709171aab2d23a5 balkon/test/Data/Text/ParagraphLayout/Rich d---------
Consolidate tree types into one.
Test interaction between boxes and mixed script.
Test soft breaking on box spacing.
Test line breaking in boxes.
Make paragraph direction explicit in tests.
Add required textDirection to TextOptions.
Test layout with mixed font sizes.
Test Rich line wrapping.
Test Rich layout.