Add the Mascots page

[mansona]

Goal

The goal of this issue is to recreate the page https://emberjs.com/mascots/ in an Ember app. The currently deployed site is a Ruby app found in a different repository, and we are working towards converting the whole site over.

Criteria

• Add route: /about/mascots
• The content look should be the same as the live site
• use ember-styleguide components (and make notes where there is not an appropriate component)

Additional Info

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