~jaro/balkon

ref: 232a08210cea94f3a4c794ad0ea43eb33aa80591 balkon/src/Data/Text/ParagraphLayout/Internal/WithSpan.hs -rw-r--r-- 1.2 KiB 
Move BiDi Level to separate module.

Allow extracting ResolvedBox from WithSpan.

Separate WithSpan for sharing with other modules.