Port to Godot 4.x

[Pysis868]

I have 4.0.3. May have 4.1 now.

Just tried full project, and only core project file, both have an empty scene, the full may have been worse? Reopened and saw the menu now, but executing displays this error:

E 0:00:05:0440   start: Script does not inherit from Node: res://Globals/GlobalState.gd.
  <C++ Error>    Condition "!valid_type" is true. Continuing.
  <C++ Source>   main/main.cpp:2776 @ start()

Just wanted to start tracking the issue for now as I tried loading the project's code today.

Seems similar to the request in #1.
I may prefer web-based projects if I were to contribute to one.

[davcri]

Upgrading this project to Godot 4.x would be a big task. I would be glad to see it happen at some point, but it's not a priority for me currently, sorry.

Feel free to use this issue for any discussion on the topic.