US5 - Bookmark & Footer

Bookmark & Footer

As a user I want to be able to add an animal to my favorites, so that I can view all of my favorites by clicking on the star icon in the footer.

[x] Each animal in the animal list has a small empty star that can be clicked to add the animal to the favorites.
[x] When an animal is added to the favorites, the star turns black.
[x] There is a footer with an icon to return to the homepage and a star icon to go to the favorites.

[x] Create a new Branch.
[x] Add an empty star next to each animal in the animal list.
[x] Implement the function to add an animal to the favorites when the star is clicked.
[x] Change the color of the star to black when an animal is added to the favorites.
[x] Add a footer with icons to return to the homepage and to view the favorites.
[x] Implement the functions to return to the homepage and view the favorites when the corresponding icons are clicked.