Register Communauté Protégée into the Entrepôt

[imath]

What your pull request is about ?

• [x] it's about registering* a plugin repository.
• [ ] it's about registering* a theme repository.
• [ ] it's about registering* a block repository.
• [ ] it's about the Entrepôt plugin's code improvement.

* Read the Plugin/theme/block author's documentation for more information. By registering a plugin, a theme or a block, I'm agreeing with the code of conduct.