It seems alacritty handles vi-mode motions in a special way and it is up
to the client to decide when redraw is necessary. With this change,
`TerminalView` notifies the context if a keystroke is processed and vi
mode is enabled.

Fixes #31447

Before:


https://github.com/user-attachments/assets/a78d4ba0-23a3-4660-a834-2f92948f586c

After:


https://github.com/user-attachments/assets/cabbb0f4-a1f9-4f1c-87d8-a56a10e35cc8

Release Notes:

- Fixed sluggish cursor motions in Terminal when Vi Mode is enabled
[#31447]