Example gallery-like structure to see all plots at a glance about beautifulmakie HOT 5 OPEN

Here's a list of todos which should encapsulate exactly what has to happen here:

• adding the reference tests as their own category, so they're still integrated and searchable but somewhat separate.
• enforcing the BeautifulMakie Literate.jl programming style for longer examples, which is really good.
• allowing multiple tags.
• creating the front page as a searchable, scrollable gallery, which has elements that redirect you to the appropriate page when clicked on.

In general, examples should:

1. Work when copy-pasted. That means that most assets should be located in the Makie monorepo, within reason, or accessed through Downloads.download.
2. Be (mostly) backend-independent, i.e. using Makie.* instead of GLMakie.*.
3. Not visibly call functions which affect global state, i.e., activate!, unless necessary (these should be hidden)
4. There should be an interface where examples can declare their tags, and some autogeneration should be done, for example to show the package versions.

from beautifulmakie.

For the gallery overview I think we should follow the idea from here. Here is the issue I opened but never acted on it 😄 . As for the other points, most are already covered, I think.

from beautifulmakie.