Add selective collision detection for different agent types

[daphne-cornelisse]

Description

This PR updates the collision detection system to implement different handling rules based on agent types:

• Vehicles and Cyclists register collisions with all other agents and road edges
• Pedestrians register collisions with other agents (including vehicles and cyclists) but not with road edges

These changes are made to allow for a more realistic simulation of pedestrian movement where they can interact with other agents but aren't constrained by road edges in the same way as vehicles or cyclists.

Todo

• Update pedestrian collision detection rules
• Handle cases where pedestrians are in collision at first time step