Wokwi CI - Support for rotating screenshots

[georgik]

Current state: Wokwi CI is able to take a screenshot, but it does not take into account orientation of simulated display. User needs to rotate the screenshot afterwards using tool like ImageMagic which might not be present in CI build container.

Example of diagram.json: https://github.com/georgik/esp32-spooky-maze-game/blob/main/esp-wrover-kit/diagram.json#L18

Desired state: Image is rotated, either by using the information from diagram.json or from a CLI parameter.

[urish]

The CI should now take into account the "rotate" value from the diagram (it only works for right angle rotations, i.e. 90 / 180 / 270 degrees)