CmdPal: Add toggle to switch between single/multi-line for list items

Description of the new feature / enhancement

Before PowerToys v0.98 (CmdPal v0.9.10754.0), entries were displayed on multiple lines. Now they are displayed on a single line, forcing the subtitle to be displayed next to the title.

I don't know if it's feasible, but would it be possible to add a toggle to select the one-line/multiple-line mode for ListPage?

Or at least at the ListPage level, by developing an extension, with an attribute like ListPage.EnableMultiLineItem = true;

Scenario when this would be used?

This might be practical and aesthetically pleasing in some cases, but in my use case, I displayed useful information in the subtitles. Since they are now displayed on the same line, I lose some information (for example, if I display a file path, I can no longer see the end of the path, especially if I also display the details panel).

Beyond the practical aspect, I liked the multi-line mode and the fact that the subtitle was smaller (in addition to being gray).

Supporting information

Introduced in issue #45763.
PowerToys v0.98.
CmdPal v0.9.10754.0.
Windows 11 version 25H2, build 26200.7922.

Start by reviewing issue #45763 and the current ListPage implementation in CmdPal to understand the change that introduced single-line items. Trace how list-item layout and subtitles are configured, then define where a toggle or ListPage-level setting would belong. Done means users can select single- or multi-line items and subtitles remain readable in both modes.