Add a 'How to Install the Kit' section

[tetrahedronix]

Hi!

The kit is very well-crafted, and I’d like to use it for my project. To further enhance the user experience, it would be helpful to add a "How to install the kit" section in the repository. Currently, there isn't a way to complete the installation by following only the Defold manual. I believe this addition would make it easier for newcomers to adopt the kit seamlessly.