Add a `snapOnOutput` setting

### Windows Terminal version

1.21.3231.0

### Windows build number

19044.2965

### Other Software

_No response_

### Steps to reproduce

open Terminal
ping -t 8.8.8.8
see the reply lines fill up window
hover mouse to window and wheel up
the new reply line do not display automatically, unless wheel down to last line

### Expected Behavior

open cmd.exe
ping -t 8.8.8.8
see the reply lines fill up window
hover mouse and wheel up
auto jumps (force) to the new line despite mouse wheel up or not

### Actual Behavior

I know so-called "bug behavior" is normal for linux or others systems, but I really need something act as the original cmd.exe does, perhaps I missed some configs?thanks

No source file, test, or entry point is named. First reproduce the behavior with Windows Terminal, cmd.exe, and `ping -t 8.8.8.8`, then trace the output-scrolling behavior and how settings are defined. Done means a `snapOnOutput` setting can force new output into view while the user is scrolled up, matching the reported cmd.exe behavior.

Written by the indexing model from the issue text.