Port to Godot 4

[bemain]

Love this project, the implementation is so elegant! Thank you a lot!
For anyone else using a newer version of Godot, I've ported the code to Godot 4. Some things are still missing (the boat, etc.), but the base implementation is there. Enjoy!
https://github.com/BeMain/dynamic-water-godot4

[bemain]

I also made an attempt at converting the implementation to 2D. It works, but doesn't at all resemble the 3D version. Check it out here:
https://github.com/BeMain/dynamic-water-godot4/tree/2d