New cpp folder structure

Signed-off-by: Alexander Borsuk <me@alex.bio>

libs/geometry/circle_on_earth.hpp

@@ -0,0 +1,12 @@
+#pragma once
+
+#include "geometry/latlon.hpp"
+#include "geometry/point2d.hpp"
+
+#include <vector>
+
+namespace ms
+{
+std::vector<m2::PointD> CreateCircleGeometryOnEarth(ms::LatLon const & center, double radiusMeters,
+                                                    double angleStepDegree);
+}  // namespace ms