Add deprecated status to this repo

[faniereynders]

According to @CarlosLanderas this repo is deprecated. To prevent confusion, a suggestion would be to add documentation to explain depcrecation and/or add a deprecated status to this repo.

[CarlosLanderas]

@faniereynders README in documentation already explains this. But I'm gonna make it more explicit.

@unaizorrilla could you edit project description to be [DEPRECATED] Description

[CarlosLanderas]

@unaizorrilla if you consider so maybe you can also archive the project in settings zone to be read-only