[Feature]: Add deterministic window bounds control to `winapp ui`

[niels9001]

Is your feature request related to a problem? Please describe.

winapp CLI 0.2.2-nmetulev-ui-command.54 can discover windows with winapp ui list-windows and capture them with winapp ui screenshot, but it cannot move or resize a target window. Automated screenshot pipelines need every app at identical geometry—for example, 1440x900 at a known screen location. Today callers must add a PowerShell or C# P/Invoke helper around SetWindowPos/MoveWindow, which adds environment-specific glue and breaks an otherwise coherent winapp ui workflow.

This is useful beyond one screenshot pipeline: repeatable visual tests, documentation screenshots, demos, and general UI automation all benefit from deterministic window geometry.

Describe the solution you'd like

Please add first-class window-bounds control under winapp ui. A unified command could look like:

winapp ui set-window-bounds -a MyApp --x 100 --y 100 --width 1440 --height 900 --json

Separate move/resize commands would also be reasonable if they better match the CLI's conventions. The operation should:

• Support the existing -a/--app and -w/--window targeting model.
• Report no target, ambiguous targets, and invalid bounds through clear errors rather than silently choosing or succeeding.
• Return requested and actual bounds under --json, since Windows or the app may constrain the result.
• Define whether coordinates and dimensions use physical pixels or DPI-scaled units, and whether bounds describe the outer window or client area.
• Define behavior for minimized/maximized windows and app-enforced minimum-size constraints, including whether the command restores or clamps the window.

Additional context

A screenshot automation step could remain entirely within the CLI:

winapp ui set-window-bounds -a $app.ProcessId --x 100 --y 100 --width 1440 --height 900 --json
winapp ui screenshot -a $app.ProcessId --output "artifacts\$($app.Name).png" --json

This would make consistent capture across a large app suite straightforward without prescribing a particular Win32 implementation.