Creates a Curve with 1 Bezier Spline from four positions (start, start handle, end handle, end) and a resolution. The handles are aligned and mirrored automatically. An "Offset" mode is also included to allow specifying the handles relative to the control points. The default settings recreate the existing default Bezier Curve in the 3D viewport add menu. Differential Revision: https://developer.blender.org/D11648