Allow CustomLink type to create link menus

Allow creation of the menu items, currently only in NavBar and Footer, to be created with an array of CustomLink types.

```react
export type CustomLink = {
name: string;
href: string;
}
```

e.g. Something like:
```react
const myLinks: CustomLink[] = [{
"name":"menu one",
"href":"/menu/one/"
}]

```