Add the BasicRectangleColliderJs library

[RandomGamingDev]

A basic rectangle collision library made for just non-rotated rectangles that tells you the face collided with and has a collision system where you can have one element be static and one dynamic with the dynamic collider getting pushed away by the other.

The library's repository: https://github.com/RandomGamingDev/BasicRectangleColliderJs/tree/main

[davepagurek]

Could you explain in the examples what the numbers and the boolean parameters in the code represent? as it is, it's unlikely that a user would be able to generalize it to their own usage without having to look into the source code.