Breadcrumb styles

Change breadcrumb background color, link and divider color, inspired by navbar component.

<!-- Source -->
<ol class="breadcrumb breadcrumb-dark bg-primary">
  <li class="breadcrumb-item"><a class="breadcrumb-link" href="#">Home</a></li>
  <li class="breadcrumb-item"><a class="breadcrumb-link" href="#">Category</a></li>
  <li class="breadcrumb-item active">Article</li>
</ol>

<ol class="breadcrumb breadcrumb-light bg-light">
  <li class="breadcrumb-item"><a class="breadcrumb-link" href="#">Home</a></li>
  <li class="breadcrumb-item"><a class="breadcrumb-link" href="#">Category</a></li>
  <li class="breadcrumb-item active">Article</li>
</ol>