Add AMP updates module to WordPress Dashboard

[jwold]

Feature description

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Acceptance criteria

Implementation brief

QA testing instructions

Demo

Changelog entry

[jwold]

Here's an initial take on what the AMP News section could look like. It's not necessarily doing much to standout. A few ideas we could try:

1. Having favicons or icons to represent each link.
2. Showing the ampwp.org featured images beside each link
3. Having an icon at the top of the module.

[amedina]

This is part of what we are calling "Knowledge Paths", which are entry points from the plugin experience that make it easy for users to get information such as YT series, documentation, news, etc. In tandem with this we want to integrate such knowledge path entry points in different places of the plugin UI.