* Remove duplicated node line example
* Update `ScreenSpaceBrowser` example to new format
* Add screenspace image examples
* Add docs and examples for `RenderableGrid`
* Add docs and examples for `RenderableRadialGrid` + create 10 grid segments per default
* Add docs and examples for `RenderableSphericalGrid`
* Remove the old, combined, grid example
* Apply suggestions from code review
Co-authored-by: Alexander Bock <alexander.bock@liu.se>
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Co-authored-by: Alexander Bock <alexander.bock@liu.se>
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