~jaro/balkon

ref: 4ef7aad8fe112d65d4b366f2132c68bb2f054dd5 balkon/test/Data/Text/ParagraphLayout/SpanData.hs -rw-r--r-- 1.1 KiB 
Minimise working with Data.Text.Internal.

Use ICU to find line break boundaries.

Store span index in ResolvedSpan.

Implement absolute line heights with half-leadings.

Implement "plain" interface.

Separate tests by module.