This repo is an example of how to implement a add-ons loader in Godot. There is 2 main proyects and 2 add-ons proyects, which contains:

• GodotGDScript: A version of a small Godot 3.5 game. It contains the AddonsLoader.gd script that loads all .pck and .zip addons. The add-ons must be installed in user://addons.
• GodotMono: A version of a small Godot 3.5 Mono game. This proyect is very interesting for me because it contains the AddonsLoader.cs. This class can loads .pck and .zip Godot packages that contains GDScript add-ons (like the GodotGDScript proyect), and also .dll libraries than use Godot Mono runtime, allowing loading of add-ons programmed in both languages. It uses the same folder like GodotGDScipt.
• AddonGDScript: A example of a GDScript add-on that prints a hello world message on load. You can compress this folder as .zip file and installs it in user://addons.
• AddonMono: A example of a Mono add-on that prints a hello world message on load. It is a .NET 6 library proyect, and you can run dotnet build over the folder to compilate the .dll file and install it in the add-ons folder used in the main proyects.