Update valid combinations of parameters for intersection() function in documentation

[ksandeep18]

This pull request addresses issue #8756 by updating the documentation for the intersection() function in the Polygon_mesh_processing.txt file. The valid combinations of parameters for the intersection() function were missing, and this PR adds the following combinations:

• Point and Circle
• Point and Sphere
• Line and Plane
• Line and Triangle
• Segment and Triangle
• Ray and Triangle
• Triangle and Triangle

These updates ensure that the documentation accurately reflects the supported parameter combinations for the intersection() function.

Changes Made

• Updated the Polygon_mesh_processing.txt file to include the missing valid combinations of parameters for the intersection() function.

File Changed

• cgal/Polygon_mesh_processing/doc/Polygon_mesh_processing/Polygon_mesh_processing.txt

Related Issue

• Closes The reference-manual page of intersection() is missing some valid combinations of parameters #8756

Checklist

• Documentation updated
• No new warnings introduced

Please review the changes and let me know if any further modifications are needed.

Additional Notes:
This PR only includes documentation updates and does not affect the functionality of the codebase. The changes are intended to improve the clarity and completeness of the documentation for users of the CGAL::Polygon_mesh_processing::intersection() function.

[sloriot]

The issue is in the kernel package, not Polygon_mesh_processing.

[ksandeep18]

Thank you for pointing that out. I apologize for the mistake in identifying the correct package. I'll create a new PR targeting the kernel package instead. Is there anything specific I should keep in mind when creating the new pull request for the kernel package?