Print Markup: comments in PDF, print, images and text copies (#589) (#667)

Rebased onto main as one commit (the branch had merge commits from main).

Co-authored-by: Dmitrii Khlapov <19991457+dkhlapov@users.noreply.github.com>
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
Co-authored-by: Brandon Thomas <echelon@gmail.com>

docs/parity-checklist.md

@@ -2,11 +2,11 @@
 
 Generated by `cargo xtask parity` (`wordcraft-cli parity --markdown`): the word-processor feature catalog (`crates/engine/src/catalog.rs`) compared with the live command registry.
 
-**481 of 496 catalog features have commands (97.0%).**
+**482 of 497 catalog features have commands (97.0%).**
 
 | Tab | Live | Total |
 |---|---|---|
-| File | 20 | 20 |
+| File | 21 | 21 |
 | Quick Access | 4 | 4 |
 | Home | 102 | 103 |
 | Insert | 47 | 53 |