FFM-based OpenGL bindings

[ctrueden]

As described in eclipse-efx/efxclipse-drift#49, the PanamaGL project "aims at providing multiplatorm binding to OpenGL using the Foreign Function & Memory API for JDK19." Once the Java 21 LTS is released (slated for 2023-09-19), we could update scenery and sciview accordingly—or consider putting FFM-based goodies into an extension library.

[skalarproduktraum]

Once Panama has stabilised and is also working on Apple Silicon, this could be interested - for Vulkan though, as OpenGL got deprecated with #539 and removed with #541. Apple has also deprecated OpenGL on macOS. I'll keep this issue open, but put it in the backlog.