Move necessary files to package folder

[BenediktHensen]

The content of the project should become a shippable package that is contained in the "Assets/Virtual Agents Framework" folder.
To do this, we need to check which components of the current functionality are necessary for the package and we should move them over to this folder.

We can simulate how the package import into an empty project would look like using the package manager under "Window > Package Manager". If you click the plus button in the opened window and select local package, you can select the package.json under "Assets/Virtual Agents Framework". This imports the contents of "Assets/Virtual Agents Framework" and makes it available to the second project. The folder should contain everything that is necessary to quickly set up an agent in the empty project.