chore(docs): Update styles to align with website and Docusauras v2 to v3 upgrade

[davidhoeck]

Description

Updates the styles for align with the new design schema of the website and updates everything to the latest Docusaurus v3.x

Breaking changes

none

Checklist

📌 Always:

• [x] I have set a clear title
• [x] My PR is small and contains a single feature
• [ ] I have checked my own PR

👍 Most of the time:

• [ ] I have added or updated test cases
• [ ] I have updated the README if needed

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