Move tests to gdextension version

Create a test session based on the `https://github.com/limbonaut/limboai repository`
Mainly in the tests folder
[LimboAI](https://github.com/limbonaut/limboai/tree/master/tests)

Using as tests the scripts already created in the repository's addon module, located in the `inventory-system\addons\inventory-system-demos\tests\ ` folder

Make separate commits of the work in progress.