How to add an email signup form to a Nuxt site with MailChimp

This is a guide for setting up a MailChimp-powered newsletter signup form on a static Nuxt site hosted on GitHub Pages. I wanted to implement this on my personal blog to grow a mailing list so I can update readers when I puslish a new blog article. I haven't done too much work with MailChimp before, but I've definitely subscribed to plenty of MailChimp mailing lists.