Godot Rapier update to Godot 4.5

Updated Godot Rapier to latest Godot (4.5) and Rapier (v29)

The version of rapier I was using for Godot Rapier was about 1 year old by now. It was missing new features and bugfixes. Most notably a 25% performance increase (theoretical, haven’t tested) as well as layers for liquids.

Also updated it to work with the new Godot 4.5. For this there was mostly a small API change.

Aside for this, the godot-rust community are working hard on a feature that might bring godot-rapier to parity with the old C++ implementation (right now it is able to do about 6k circles before dropping FPS, after it might reach 9k circles).

Upcoming features

• Increased performance
• Module build

Other things aren’t really planned, I might fix more bugs moving forward, but first I want to solve these 2.