Ship file viewer, editor improvements, and private package releases

examples/basic-app/public/viewer/sample.rtf

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+{\rtf1\ansi{\fonttbl{\f0 Times New Roman;}}\f0\fs24 Rich Text Format\par\par This document is read in the browser with no dependency at all \u8212? RTF is text once the control words are gone.\par\par Accented text survives: Caf\'e9.}