Add Favorites page

[MaryBruff]

Add Favorites page that stores favorite genres in localStorage.

As a User..

When I land on the search page, I see a tab in the NavBar that says Favorites.
When I click on Favorites I am taken to the favorites page where I see a table with my Favorite genres or a message that says "No Favorites added."

After I search an Artist and click on a genre I am taken to the Playlists page where I can favorite the genre.
I see a button that I can use to either favorite or unfavorite a genre