Spring Cleanup

[kaechele]

This repository is in need of a clean-up.
When collaborating on some changes with Ed I noticed that there is no consistent style being followed throughout the source code and there is also quite a bit of cruft in the repository.

So I've started cleaning this up a bit.

I think we should tackle these things in order (feel free to chime in):

• Introduce automated formatting with prettier and optional enforcement through pre-commit #162
• Remove unused dependencies (https://github.com/kaechele/openclarity.io/tree/remove-unused-dependencies)
• Update all remaining dependencies (https://github.com/kaechele/openclarity.io/tree/update-deps-and-nextjs)
• Upgrade nextjs to version 13, run codemods to facilitate migrations due to breaking changes (https://github.com/kaechele/openclarity.io/tree/update-deps-and-nextjs)
• Replace use of next/legacy/Image with next/Image
• Fix linter errors/warnings
• Fix errors/warnings logged to browser console
• Introduce next-image-export-optimizer to address the use of next/Image with export

Anyone willing to lend a hand with reviews?