Add manual test for mixed vertical alignment.

Test with AlignStart by default.

Test shaping across intra-word breaks.

Improve BiDi handling of numbers and neutrals.

Test mirrored neutral characters.

Add shaped runs output for bidirectional text.

Add shaped runs to manually test pagination.

Update formatting in golden files.

All golden files are regenerated to use the new formatting.

This only affects whitespace (including newlines), otherwise the golden
values are perfectly equal. You can check this using the command:
`git show --word-diff-regex='[^[:space:]]'`

Rename golden files for easier tracking.

Make demo font size better match window.

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.