chore: Update to Next14

[VaniaPopovic]

• Updates this repo to use Nextjs 14
• Removes workaround for prisma as it is fixed now - Next.js 13 - ENOENT: no such file or directory, open /var/task/.next/server/chunks/schema.prisma prisma/prisma#16117
• Adds workaround for Image component in mdx files for next after 13.5 as suggested in NextJs 13.5 Error: Cannot access Image.propTypes on the server. You cannot dot into a client module from a server component. You can only pass the imported name through. hashicorp/next-mdx-remote#405
• Bumps all dependancies except a few content layer /mdx ones
• Replaces deprecated domains in next.config.js and with remote domains
• Moves themeColour in viewport rather than metadata ( change in next14)

Closes: #251 #192

[IsaacCDHall]

Thank you