Is your feature request related to a problem? Please describe.
F3D supports loading camera from files and provide a --camera-index CLI option to select it. F3D also support animation which could animation the selected camera. However, many file do not have any camera nor animations.

Lets add a dedicated CLI option to add an animated camera orbit

Suggested implementation

• Add a CLI options --camera-orbit that let user specify the time to complete orbit
• When used, this will add an animation with good default if there is none, or rely on existing animation if there is some
• Add dedicated logic in animationManager::tick to update camera accordingly to camera parameters
• Should support loading correctly at any time
• Add tests