feat(utilities): add closestLine and containingRectOrClosestLine algorithms

[asterix696]

Two new collision detection strategies are introduced:

• closestLine: Calculates the closest droppable container based on the distance between the pointer and the diagonal line of each container. This can provide more accurate results in scenarios where traditional bounding-box-based detection may fail.

• containingRectOrClosestLine: Returns the container if the pointer is inside its bounding rectangle. If not, it falls back to the closestLine strategy to find the closest container based on diagonal distance.

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[clauderic]

Can you elaborate on the benefits of this approach?

[asterix696]

Certainly! These two strategies aim to address limitations in center or corner based collision detection, especially in complex or non-standard UI layouts enhancing UX in drag-and-drop where containers overlap or are tight.

They bring more value in these cases:

• closestLine: it works better in some layouts, especially with thin or custom-shaped droppable areas, where using center or corners can lead to unexpected or inaccurate detection.

• containingRectOrClosestLine: given this strategy first checks if the pointer is inside a container, it prevents the misses when the pointer is technically inside a container but might be misclassified by proximity-based strategies. If the cursor is not in any container it has all the benefits of the closestLine algorithm.