[1pt] Create a Game & Author Class and add properties - Student 3

[RaoAkif]

• Create a Game class in a separate .rb file.
• Create an Author class with an association to the Item class (in a separate .rb file).
• All Game class properties visible in the diagram should be defined and set up in the constructor method.
• All Author class properties visible in the diagram should be defined and set up in the constructor method.