Sets up a Nix devshell for C++ development with Godot's GDExtension.
Currently, only supports Godot 4.4.1.
Nix 25.05 package manager or NixOS
With just Nix alone, you can enter the devshell via:
nix develop github:hamham240/gdextension-cpp-nix-tools
TODO: Template repo using this devshell soon to come