Update to Godot v4

[18a93a664c]

Time for an update, Grumoth!

This project is too big to update for new users that are unfamiliar with v3.X and the new v4.0.

Can you consider working on it?

[Grumoth]

Hey! I have considered it already, but kind of busy with work and another Godot project .
Also I considered to make a whole new improved version instead, but would be in the future.
Cheers!

[scythia-marrow]

So as a friendly neighborhood helper I'm currently working on the godot4 update on a local branch, and yes it is quite the big change. Some things are improved, such as the JSON serialization and file access code, which is much nicer in godot4, but there are a lot of breaking changes. Lots of node and global function names are changed (like range_lerp -> remap), but the most tricky part is the shaders. Just about every shader is failing to load, so while I have made good progress on the basics I expect the update to take a bit of time due to shader fixes.

Good luck on your other Godot project, and hopefully I can help you out with this one by sending a pull request your way that closes this issue "soon"ᵗᵐ.

[Grumoth]

Hey! Thanks for your interest! Hope you can overcome all of those changes, looks like it would be even easier to start an upgraded new project from scratch , which I'm considering in the mid term, but I can't promise it, so if this gets updated would be amazing indeed.
Thank you very much!