[1pt] Implement methods in the MusicAlbum and Genre class (Team member #2)

[Zuhaib042]

• Implement methods:
  • add_item method in the Genre class
    • should take an instance of the Item class as an input
    • should add the input item to the collection of items
    • should add self as a property of the item object (by using the correct setter from the item object)
  • can_be_archived?() in the MusicAlbum class
    • should override the method from the parent class
    • should return true if parent's method returns true AND if on_spotify equals true
    • otherwise, it should return false

[Zuhaib042]

hi @kene-creator can you please have a look at this PR https://github.com/devMunyi/catalog-of-my-things/pull/87