~jaro/balkon

ref: dfa301d6c0659e437ae66d72787a23b4393b33f2 balkon/src/Data/Text/ParagraphLayout/Internal/Rich.hs -rw-r--r-- 3.1 KiB
Link ResolvedSpan to boxes.
Separate WithSpan for sharing with other modules.
Add basic support for Rich layout.