Convilyn SDK sample input.

This is a tiny plain-text file used by the runnable examples in this
directory. The Convilyn `document_conversion` processor accepts TXT
as a source format and can produce PDF, DOCX, HTML, or Markdown as
the target — pick whichever format you want to exercise.

The examples convert this file to PDF by default; substitute any
other text content or any document you have on disk to try a real
workload.
