Storybook: Add BlockImage component (as well as Fancybox)

[laespinoza]

Checklist

• Include a description of your pull request and instructions for the reviewer to verify your work.
• Link to the issue if this PR is issue-specific.
• Create/update the corresponding story if this includes a UI component.
• Create/update documentation. If not included, tell us why.
• List the environments / browsers in which you tested your changes.
• Tests, linting, or other required checks are passing.
• PR has an informative and human-readable title
  • PR titles are used to generate the change log in releases; good ones make that easier to scan.
  • PRs will be broadly categorized in the change log, but for even easier scanning, consider prefixing with a component name or other useful categorization, e.g., "BaseButton: fix layout bug", or "Storybook: Update dependencies".
• PR has been tagged with a SemVer label and a general category label, or skip-changelog.
  • These tags are used to do the aforementioned broad categorization in the change log and determine what the next release's version number should be.
  • Release Drafter will attempt to do the category labeling for you! Please double-check its work.

Description

Adding BlockImage to our components list. This PR also adds Fancybox (scss and template classes taken from WCP), addresses issue #33 .

Instructions to test

1. Pull this branch
2. npm run storybook

View it under Components > Blocks > BlockImage

• StreamfieldBlock
• Standalone Full Bleed
• Standalone Standard

You can test the lightbox option by clicking on the expand icon in the top right corner of the image.

WWW Storybook equivalent: https://designlab.jpl.nasa.gov/storybook/?path=/docs/components-blocks-blockimage--streamfield-block

Tested in the following environments/browsers:

Operating System

• macOS
• iOS
• iPadOS
• Windows

Browser

• Chrome
• Firefox ESR
• Firefox
• Safari
• Edge

[stephiescastle]

Thanks @laespinoza86, this is great! Also a nice feature for those who need easy modals.

I had some thoughts about the LayoutHelper class, and I also think we should eventually add a story for the Fancybox Button.

[stephiescastle]

Thanks for the changes @laespinoza86 !