Area of intersection refactoring

[thomaspiller]

The current implementation for calculating the area of intersection within the Area Intersection Tools tool is outdated and requires refactoring [link]. To enhance performance, all operations should be performed directly in the database. Two types of calculation could be implemented depending on the type of geometries:

1. Area of intersection between layers of polygon type.
2. Number of overlapping features across all geometry types (point, line, polygon).