~jaro/balkon

ref: 8ec0fe09ec568b7e5309df9dc37cd3c0f7635283 balkon/.golden/richParagraphLayout/nestedBoxes.golden -rw-r--r-- 7.9 KiB 
Describe box edges with extensible type.

Handle ancestor boxes in rich layout.

Add ancestor boxes to interface.

Test Rich layout.