As a Plotter I want to be able to import/export novel Outlines in a standard format like markdown, JSON, or YAML so that I can use NC as the repository for our writing factory.

Novel, Act, Chapter, Scenes, Beats should all support using a schema of standard fields. At a minimum a "summary" field should be available for each unit of the outline.

Ideally the schema can be data-driven and just provided in the document and parsed. An example of this is the convention of using header level in markdown to distinguish Novel/Act/Chapter/Scene/Beat.