Improve landing page

[orzechow]

After

• Add project website #33

we should improve our landing page.

• Add a early section arbitrators in a nutshell explaining the awesomeness of arbitrators, why/when to use them, etc.
• Update docker section → point to our ghcr.io image
• Acknowledge contributors
• Point to paper / how to cite
• Add
• …?

[orzechow]

@ll-nick FYI

[orzechow]

Add

@ll-nick Thanks for #74

As you mentioned, code-coverage would be nice as well.
I guess integration of e.g. codecov.io (see quickstart docs) isn't big of a thing, feels a bit overkill though…
A simple coverage report can be generated by CTest as well. But we'd have to then somehow provide this report as e.g. json to generate a dynamic shield 😅

[ll-nick]

Yes, I'd also like to have code coverage 🤔
I guess a relatively simple way would be to compute the code coverage with ctest and provide a code coverage report as a release asset. The downside would of course be that we can't use code coverage metrics on other branches or as a quality measure when adding new PRs but for a shield.io badge, it would be sufficient.