Implement basic computational geometry algorithms

[bluedawnstar]

• Circles
  https://cp-algorithms.com/geometry/tangents-to-two-circles.html
• Points
  https://cp-algorithms.com/geometry/nearest_points.html
• Polygons
  https://cp-algorithms.com/geometry/point-in-convex-polygon.html
• Seep-line
  https://cp-algorithms.com/geometry/point-location.html
  https://cp-algorithms.com/geometry/intersecting_segments.html
• Delaunay triangulation and Voronoi diagram
  https://cp-algorithms.com/geometry/delaunay.html