craft_keymap::Key gains IntlBackslash, the key between left Shift and Z
on ISO keyboards (`<` and `>` on Turkish Q). Key::from_egui and to_egui
map it to egui's IntlBackslash, so the shortcut recorder records it and
the dispatcher runs its bindings. Its shortcut text is `IntlBackslash`
(`Cmd+IntlBackslash`, `Shift+IntlBackslash`), read without regard to
case; `<` and `>` still parse as no key.
The key counts as a symbol position: Shift stays in the chord, and once
the layout has typed `<` there, display_for shows `Ctrl+<`.
MAX_CHORD_TEXT goes from 64 to 72 bytes so that the longest canonical
trigger, `Cmd+Ctrl+Alt+Shift+IntlBackslash` pressed twice, reads back.
aiongg