plotting code should be in extensions?

[gaelforget]

Should the various plotting codes in examples be grouped into extension (Makie, Plots)?

This would allow for standard CI (test/runtests.jl) and increase reusability.

• https://github.com/JuliaClimate/IndividualDisplacements.jl/blob/ff13ed8a09f5b6a950821f5cae988990880ce6ca/examples/basics/random_flow_field.jl#L101
• https://github.com/JuliaClimate/IndividualDisplacements.jl/blob/ff13ed8a09f5b6a950821f5cae988990880ce6ca/examples/basics/solid_body_rotation.jl#L133
• https://github.com/JuliaClimate/IndividualDisplacements.jl/blob/master/examples/worldwide/global_ocean_plotting.jl
• https://github.com/JuliaClimate/IndividualDisplacements.jl/blob/ff13ed8a09f5b6a950821f5cae988990880ce6ca/examples/worldwide/three_dimensional_ocean.jl#L62
• https://github.com/JuliaClimate/IndividualDisplacements.jl/blob/ff13ed8a09f5b6a950821f5cae988990880ce6ca/examples/worldwide/interactive_UI.jl#L147

[gaelforget]

update :

• has been done for the Makie recipes in Extension for Makie plot recipes #134
• remains to be done for the Plots recipes (please consider sending PR)