Find the intersection points between two curves.

Input parameters:

1. C1 → First curve for intersection.
2. C2 → Second curve for intersection.

Output parameters:

1. Nx → Number of intersections found.
2. Pt → All intersection points.
3. L1 → Loci of all intersections on the first curve.
4. L2 → Loci of all intersections on the second curve.