Get the z-index of a window?

[Mufanc]

I am planning to develop a screenshot tool using Tauri, which includes the functionality to select a window for capturing. Users will be able to move the mouse cursor to select the window they wish to capture, similar to traditional screenshot tools such as Snipaste.

However, it appears that xcap currently does not support retrieving the z-index of a window. In other words, when a user moves the mouse cursor to a specific coordinate and there are multiple windows containing this coordinate, I am unable to determine which window to capture.

Therefore, I would like to inquire politely to the developers whether there are any plans to add the capability to retrieve the z-index of windows in xcap in the future.

[nashaofu]

Merged #173