Upgrade to Nuxt 3

[ricardobalk]

Sure, VuePress 2 is cool — but let's upgrade to Nuxt 3!

Task description

• Upgrade to Nuxt 3
• Use TailwindCSS
• Drink something (coffee, tea, beer, wine, ...)

[ricardobalk]

So, this has actually been finished recently.

Just in case anyone wonders which steps I've taken to merge two repositories into one single repository:

• I have rebuilt the website in Nuxt 3 on a separate repository, and added that as an extra remote to the working directory with this repo to my working directory (git remote add new-version git@github.com:[...].git, new remote is called new-version).
• Cleaned up the branch develop on this repository, i.e. deleted all files (9082fe3629755ea0f699a7c9d47967f27069a8cb) to avoid merge conflicts. Everything would've been overwritten anyway.
• Created a branch called nuxt3 on this repository, and switched to that branch (git checkout -b nuxt3)
• Merged main branch of the new-version remote into the nuxt3 branch (4b6c9a9c4fbf013fee6b5face497aed38456a55a) (this required git merge --allow-unrelated-histories new-version/main)
• Merged nuxt3 into develop (ec6e7fa8ef279d2f4d481ddfd3cf1ce2af83411f)
• Merged develop into main (52fcb47fe465e9cd2e6c9ee8ac3656095d2fc624)

Still working on some extra things like dependency updates and will add version tag 4.0.0 to it.