Update Antora docs content with new terms and structure
Grep through the documentation and replace any old terms/structures/content with updated architecture decisions, such as:
- component.yml -> antora.yml
- documents/content -> pages
- samples -> examples
- _fragments -> _partials
Also, add any missing xrefs and do other minor docskeeping <- I think I just made up a new term for myself, this calls for a
Edited by Dan Allen