Feature: Adding boilerplate print styles

[stephiescastle]

Checklist

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Description

Supports https://github.com/nasa-jpl/www/issues/223

Instructions to test

1. make vue-storybook
2. view isolated stories: example: http://localhost:6006/iframe.html?args=&globals=theme:ThemeEdu;viewport:mobile2&id=templates-edu-pagecontent--base-story#/ (you can get this link by browsing to a story and click on the "external link" icon in the top right
3. emulate print styles or print preview

Tested in the following environments/browsers:

Operating System

• macOS
• iOS
• iPadOS
• Windows

Browser

• Chrome
• Firefox ESR
• Firefox
• Safari
• Edge