fix(ui): draw Arabic and other non-Latin comment text in balloons (#950)

* fix(ui): draw Arabic and other non-Latin comment text in balloons

Comment balloons and the Comments pane draw comment text and author
names with the interface faces (Inter, Source Sans, CJK), which have no
Arabic, Hebrew, Thai and so on: every such letter was a box. The app now
borrows a document fallback face that covers the comments, as the window
caption does (#840), checked once per document revision.

egui also lays bidi runs and words out left to right, so a right-to-left
comment read backwards. Read-only balloons now wrap the text by word
widths, put each row in display order (Unicode bidi runs, words of a
right-to-left run reversed, brackets mirrored) and set right-to-left
paragraphs against the right edge. Text without right-to-left letters is
laid out exactly as before. The editable fields (the selected balloon and
the Comments pane) keep logical order.

Also adds my contributor entry (sync_github_name).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

* One contributor entry each

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

---------

Co-authored-by: Mohamed Youssef <ms.rightsteps@gmail.com>
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
Co-authored-by: Brandon Thomas <echelon@gmail.com>

Cargo.lock

@@ -5394,6 +5394,7 @@ dependencies = [
  "serde_json",
  "sys-locale",
  "toml",
+ "unicode-bidi",
  "wordcraft-doc",
  "wordcraft-engine",
  "wordcraft-fonts",