**** Navbar React Project ****
Note :
* As a developer, I can pass a list of nav menu texts to the NavMenu
* As a developer, I can add an href to the links
* As a developer, I can mark a link as active
* As a user, I can use the links to navigate to other pages
* As a user, I can tell which link is active
* As a developer, I can pass nested lists
* As a user, I can open nested menus