Showcase: Add extra information

[julien-deramond]

Description

Before the refactor of the website, showcase cards looked like that:

Do we add back the following information?

• Contributors
• Discussions
• Stars
• Forks
• Issues
• Pull Requests

If so, then a specific kind of card must be built in this repository.
If not, getting all this information becomes useless, so the script must be updated.