Support hard line breaks.
Include fontInfo in the repository.
This should make it possible to use the sample test outputs straight
from the repository, without having to build and run the tests.
Add shaped runs for demo.
Test effect of paragraph prefix.
Test forming and breaking ligatures.
Allow breaking at character bounds.
Implement trimming spaces at end of lines.
Add line wrapping tests with spans.
Make paragraphRect origin always 0,0.
This convention should make it easier for the caller to properly place
the paragraph within a document.
Test line splitting with many runs.
Add ignored prefixes and suffixes to test data.
This ensures that implementation does not rely on the texts having zero
offset inside their byte arrays.
Use ICU to find line break boundaries.
Implement line breaking on code point boundaries.
Use top edge for placing lines.
Implement absolute line heights with half-leadings.
Calculate "normal" line height and pen position.
Upgrade Fragment to contain pen position.
Implement "plain" interface.