Adding BreadcrumbList schema.org spec

[kiwiupover]

Closes #118

Usage:

{{bread-crumbs hasSchema=true}}

TODO

• make decision on where to do the configuration
  1. use the config.environment
  2. use the current solution and find and alternative place to reopen the LinkComponent

https://developers.google.com/search/docs/data-types/breadcrumbs
http://schema.org/BreadcrumbList

output from foo/bar/baz route

Validate the output here https://search.google.com/structured-data/testing-tool

<ol id="hasSchema" itemscope="" itemtype="http://schema.org/BreadcrumbList" class="ember-view breadcrumb">
  <li id="ember469" itemprop="itemListElement" itemscope="" itemtype="http://schema.org/ListItem" class="ember-view">
    <a id="ember470" href="/foo" itemscope="" itemtype="http://schema.org/Thing" itemprop="item" class="ember-view"> <span itemprop="name">
            I am Foo Index
          </span>
    </a>
    <meta itemprop="position" content="1">
  </li>
  <li id="ember472" itemprop="itemListElement" itemscope="" itemtype="http://schema.org/ListItem" class="ember-view">
    <a id="ember473" href="/foo/bar" itemscope="" itemtype="http://schema.org/Thing" itemprop="item" class="ember-view active"> <span itemprop="name">
            I am Bar
          </span>
    </a>
    <meta itemprop="position" content="2">
  </li>
  <li id="ember475" itemprop="itemListElement" itemscope="" itemtype="http://schema.org/ListItem" class="ember-view"> <span itemprop="name">
        I am Baz
      </span>
    <meta itemprop="position" content="3">
  </li>
</ol>

@trabus thanks for your help!!

[kiwiupover]

@poteto
I thinks this is a good start. There are a couple of issues which I will comment in the code.

Is there no CI?

[kiwiupover]

I will update the readme when this is ready to land and we have a final API.

Cheers

[kiwiupover]

We need to do this in two places we could move it a mixin.

[kiwiupover]

We could make one more component to clean up this level of nest ifs

[kiwiupover]

FYI These attrs it the link-to with not be compiled if we don't reopen the LinkComponent

Have you thought about using the href-to addon here?

[kiwiupover]

We need to reopen the LinkComponent to add attributeBindings but need to do this behind the hasSchema flag. However that is too late in the code execution path.

Also to make this backward compatible we need a version flag to switch to LinkView in pre 2.10 apps.

Do you have thoughts about?
We could move the configuration to the ENV and reopen the LinkComponent in the initializer