Improve command tracking scroll behavior

[Tyriar]

Current when scrolling to commands in the terminal (cmd+up/down) it will scroll the command to the top of the terminal. We should instead align with breakpoints/outline/go to symbol and improve this considering we're getting a highlight in #46561 which will make the line in question more obvious.

The exact behavior I'll do is:

• When the command is in the viewport: Don't scroll, just highlight
• When the command is not in the viewport: Scroll to it and position the command in the first 1/3 or 1/4 of the viewport*

* This aligns with how Go to Symbol does it, breakpoints/outline by contrast goes to the center. I'd argue that for commands, similar to navigating to a symbol, the lower context is much more important and since that gives precedence we should align with that behavior.