Creates UI for the e-mail subscription form

[jongomez]

Description:

Creates UI for the e-mail subscription form.

Figma link

Related Issue(s):

#206

Changes Included:

• Bugfix (a change that fixes an issue)
• New feature (a change that adds new functionality)
• Refactoring (a change that improves code quality and/or architecture)
• Other (explain below)

Implementation Details:

Simple subscription react component. The onSubmit logic was not implemented yet. But, I added a prop to the component in case we want to define this from the parent component.

Testing:

For testing, I added this component to the article footer. This was done locally, and is not included in this PR.

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• My changes generate no new warnings
• Any dependent changes have been merged and published in downstream modules

Here's what it looks like:

[vercel]

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Name	Status	Preview	Updated (UTC)
lpe	✅ Ready (Inspect)	Visit Preview	Oct 23, 2023 0:28am

[jongomez]

Closing this for now - as we went with another design:

#211