Windows Terminal captures Alt+Enter at the terminal layer (fullscreen
toggle), so documenting 'Alt+Enter or Ctrl+J' without qualification
leaves stock Windows Terminal users with no working newline key they
can discover from the docs alone.
- Main keybindings row: note Alt+Enter is intercepted on WT and direct
users to Ctrl+Enter / Ctrl+J instead.
- Shift+Enter compatibility table: split 'stock Windows Terminal' from
Windows Terminal Preview 1.25+ (which added Kitty protocol support
and works with the keybinding from this PR once enabled).
- Add AUTHOR_MAP entry for ra2157218@gmail.com -> Abd0r so the salvage
commit passes the email-mapping CI gate.