file.open on a .indd reported "not a DesignCraft document: expected value at
line 1 column 1"; file.openBytes with a .indd name failed the same way, and a
dropped .indd was placed as a graphic. All now say InDesign documents and
templates can't be opened yet and point to File > Export > InDesign Markup
(IDML), which DesignCraft already opens. The check is by extension, before
anything is read.
Also adds my contributors/people.toml entry.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
