Grab and Move Support Touch Resizing

### Description of the new feature / enhancement

When dragging a window with touch using another touch point to resize the window would be awesome. Similar UX as the resize with Grab and Move today.

One challenge would be this is a combined move and resize action. Today resizing a window with touch does keep the window interactive to touch, so while moving a window the user can also scroll in the the window.

### Scenario when this would be used?

Resizing windows with touch is very difficult because the resize border thickness is tiny. A pinch gesture to resize a window would be easy and natural.

### Supporting information

_No response_

No file, test, or entry point is named. Start by locating the PowerToys utility that implements Grab and Move and its existing touch-resize behavior, then reproduce the described pinch gesture. Done means a touch drag can move a window while a second touch resizes it, without losing the window’s touch interaction.

Written by the indexing model from the issue text.