Proper dynamic window type support

[mwestphal]

Is your feature request related to a problem? Please describe. VTK recently introduced support for dynamic loading of graphical stack: https://gitlab.kitware.com/vtk/vtk/-/merge_requests/11367

Once https://github.com/f3d-app/f3d/pull/1620 is merged, we will support it implicitely but our current API in regards to the WindowType does not reflect this, lets improve it

Describe the solution you'd like

• Add a new window type, dynamic, which will be the default and just create a RenderWindow
• Make native window type create actual native window
• Add egl and osmesa window types (optional)
• Add a log warning when trying to use F3D in interactive mode while not using dynamic or native.
• Add testing in the lib for these
• Rework headless CI to just position the env var instead of the CMake options
• Add headless CI for windows too
• In superbuild, remove headless build
• In superbuild, add a simple headless test in CI using env var, on linux and windows

[apchenstu]

Looking forward to this update! I am also wondering whether the pyf3d supports egl window and headless rendering?

[mwestphal]

It currently does not but once https://github.com/f3d-app/f3d/pull/1620 is merged it should!