Native highlight

[s1hofmann]

Short overview
Add native "highlight" method similar to the Sikuli implementation

Use case
E.g. to highlight screen regions for image based matching.

Detailed feature description
When performing screen based actions it would be great to have a "highlight" functionality (red border around a given region) to visually track which regions has been detected via screenshot matching.
One simple approach would be to display a window showing a modified screenshot.

Drawback: The window blocks the screen, so underlying actions are not captured. Might be acceptable for debugging purposes.

Additional content

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