New example: transformed mesh image

[asinghvi17]

My code:

SPHERICAL_TRANSFORM_FUNC = Makie.PointTrans{3}() do point
    θ, ϕ, r = point # we interpret this way so that e.g. surface works correctly.
    return Point3(
        (r + 1) * cos(ϕ) * sin(θ),
        (r + 1) * sin(ϕ) * sin(θ),
        (r + 1) * cos(θ)
    )
end

using GeoMakie
f, a, p = meshimage(-π..π, 0..π, rand(10, 10); z_level = 1, axis = (; type = LScene,))
p.transformation.transform_func[] = SPHERICAL_TRANSFORM_FUNC
f

Need to clean this up and upload!