Upgrade NextJS / Bootstrap 5

[scorpiontornado]

• Upgrade NextJS
• Resolve issues from conversion, e.g. Invalid <Link> with <a> child and Text content does not match server-rendered HTML
• Upgrade Reactstrap and manually convert Argon design system to Bootstrap 5 - seemingly will fix the latter issue

[scorpiontornado]

See also:

• https://stackoverflow.com/questions/76298383/how-do-i-use-an-image-as-a-link-in-next-js
• https://stackoverflow.com/questions/71706064/react-18-hydration-failed-because-the-initial-ui-does-not-match-what-was-render