~jaro/balkon

ref: 5a89c6f79dec94bfd7f56e00b835cbdd6959ad6a 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.