feature(component): Rewrite Breadcrumbs to use themes, resolves #129

[tulup-conner]

Breaking changes

Breadcrumbs can now be customized using <Flowbite theme={..}>.

breadcrumb: {
  item: {
    base: string;
    chevron: string;
    href: {
      off: string;
      on: string;
    };
    icon: string;
  };
  list: string;
};

Features

• feature(component): Allow props on Breadcrumb, excluding className
• feature(type): Add theme for Breadcrumbs

Tests

Unit

• test(component): Add a11y unit tests to Breadcrumb

[tulup-conner]

Just need the className exclude helper to wrap this up

[tulup-conner]

@rluders I think this should be ready now!

[tulup-conner]

BTW, I undid a change where I made it so you can't pass className to breadcrumb directly. We have an example in the docs that uses this (dark background). I don't really think that's an issue since we aren't controlling any classes on the breadcrumb parent (the <nav>)

Breadcrumb.Items are still blocked