uniformly package: Uniform sampling on various geometric shapes

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• Arbitrary dimension: sampling on/in sphere, in ellipsoid, on unit simplex, in simplex, on/in cube

• Dimension 3: sampling on ellipsoid, spherical patch, on spherical triangle, on spherical cap, on hemisphere, in tetrahedron, on/in torus

• Dimension 2: sampling on ellipse, on/in triangle, in star-shaped polygon, in annulus