Archive Repo and/or add notice about not being maintained and propose datafaker.net

[rowi1de]

• Add a hint that this repo is not maintained anymore and recommend https://github.com/datafaker-net/datafaker/ as replacement

[SandeepLakka]

Thank you @rowi1de for introducing me to the datafaker repository, I'm currently trying to create side project (https://github.com/SandeepLakka/Mockify) to serve APIs with mock data using this java-faker repo but will consider migrating to datafaker. +1