Add full-width template

[MuluhGodson]

Fixes

Fixes https://github.com/creativecommons/project_creativecommons.org/issues/250 by @brylie

Description

This PR adds a new full-width template to be used for the homepage and other pages which need to have full-width elements. We also have the Default Template which puts everything in a container.

We also added the breadcrumb code in an element with the container class so that the breadcrumbs are also aligned to the container.

Checklist

• My pull request has a descriptive title (not a vague title like Update index.md).
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• My code follows the established code style of the repository.
• I added or updated tests for the changes I made (if applicable).
• I added or updated documentation (if applicable).
• I tried running the project locally and verified that there are no
  visible errors.

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