Add service to capture and save the frame

[torbsorb]

This service would wrap both the capture() API as well as frame.save(). It would take a path where the extension must match what frame.save() supports, see Point Cloud formats. See also Capture Tutorial - Save

[apartridge]

This service was added in https://github.com/zivid/zivid-ros/commit/05964d6d57d1efcc2218424ae3b9da1ac6200ae0.