Prepare for test modules sharing Golden definitions.

Colocate golden test definitions with specs.

Colocate definitions of golden test paths.

Rename golden files for easier tracking.

Prepare for test modules sharing PrettyShow.

Prepare for test modules sharing font options.

Make demo font size better match window.

Separate internal plain Paragraph/ParagraphLayout.

Fix style: white space in lambdas.

Fix style: white space around operators.

Fix style: white space in exports and imports.

Fix style: remove duplicate spaces.

Add paragraph pagination.

Separate module for the ParagraphLayout type.

Test removing spaces around lines.

Ensure tests do not pass with missing files.

Support hard line breaks.

Add shaped runs for demo.

Allow custom font options outside FontLoader.

Improve test readability with runIO.