fix(editor): a read-only table's rows fit their cells

A table keeps each row's height on its cells and corrects it after
layout through a transaction, which a read-only editor never applies:
in a path step, a note or a card, a cell of several lines (る, う, つ in
Tae Kim's conjugation tables) ran over its row's borders. Our fork of
the editor now sizes the rows of a read-only table in place, as it
already did the table's height (81c3006c on halkyon/win32-v6; upstream's
main has the same code).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01MMm7usAo6q9ZZRoPkWjoxi
Signed-off-by: Tizian 「ティツィアーン」 <raisondetredev@pm.me>

halkyon_learn_flutter/pubspec.yaml

@@ -29,7 +29,7 @@ dependencies:
   appflowy_editor:
     git:
       url: https://code.halkyon.app/project-halkyon/appflowy-editor.git
-      ref: 83bdb2a3e66881eff9b2f8afe416b57fc791daf9
+      ref: 81c3006c74e789ed2e470b8612529541b358fd26
   # Anki packages are zip files.
   archive: ^4.0.7
   # Sounds in content (pronunciations): one package for all five platforms; on