Migration 3: Set up Next.js project and migrate essential assets

[Brenosalv]

Description

Initialize Next.js project, transfer essential assets and components, and make sure all is functional.

Work required

• Create a branch or a fork for migration: git checkout -b migration-gatsby-to-next master.
• Set up a Next.js project with TypeScript: npx create-next-app@latest.
• Transfer global styles and environment variables.
• Migrate assets from the /static folder in Gatsby to the /public directory in Next.js.
• Move and adapt the Layout component, including the header and footer.
• Ensure all transferred assets and components function correctly.