Merge branch 'main' of git.argonaut-constellation.org:~alcinnz/CatTrap

Define public APIs.

Restrict main CSS APIs.

Restrict exports for inline & paragraph styling libraries.

Export extended length parser.

Export numeric conversion utility.

Constrain exports from Graphics.Layout.CSS.Length

Rename Graphics.Layout.CSS.Internal to Length

Fix imports in Graphics.Layout.CSS.Font

Fix imports for abstracted CSS API.

Seperate out Font API from internals.

Switch inline nodes to inherit from parent rather than use default values.

Implement rudimentary pagination.

Attempt to fix failure to query system fonts.

Typecheck fixes.

Hardcode fallback fontfile, associate vals per span-line not per span.

Capture length of spans when lowering runs of inlines.

Fix inlines getting prematurely cut off.

Revert false-fix skipping inline layout if empty, set display: inline upon inherit.

Fix for mixed-child elements on stripping out extraneous whitespace.