[tormazs]

This reviews the Hungarian strings that were machine-translated since #1132 (in #1130, #1143 and
#1152). They are all reviewed now, so po/hu.po has no fuzzy entries left.

Fixed:

• The plural form of "%d characters selected." had picked up stray words ("kijelölés
  szövegezéséből:").
• "Progress" in Document Info on iOS, and "{}% through" with it, so that VoiceOver reads the pair
  as one natural phrase ("Haladás, 15%-nál tart").
• The notes and bookmarks export: the menu item and its shortcut name, the "Include the passage…"
  checkbox, which was ungrammatical, and the two Tesseract messages on Linux.
• "{} (not on this keyboard layout)", which read as "not on this keyboard layout but another one".
• The context menu had three items on K. "Create bookmark" and "Find next" now use other letters,
  and "Save image as..." has its own.

User guide. The context-menu sentence is reworded and keeps PDF from #1144. The marker on the
first line is recomputed from the current doc/readme.md, so the open #1159 no longer needs to
touch doc/readme-hu.md.

Style guide. po/style/hu.md gets the new terms (passage, notes and bookmarks, progress,
save image as, package manager), so later strings follow these choices.

Tested on:

• macOS 27 (Apple silicon), built from source: the new strings in Hungarian, including the File
  menu and the export dialog.
• Windows 11 (Hungarian), in a virtual machine, built from source: the File menu, the export
  dialog, the Save image dialog, and the context menu on a picture, where every item now has a
  letter of its own.
• cargo test --workspace, and the UI tests the Windows CI job runs with --ignored, pass on
  Windows. On macOS cargo test --workspace passes except macos_menu_shortcuts, which fails on
  my machine with or without this change, because of my Hungarian keyboard layout.

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