[New language request] CUE

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Language
CUE is an open-source data validation language and inference engine with its roots in logic programming. Although the language is not a general-purpose programming language, it has many applications, such as data validation, data templating, configuration, querying, code generation and even scripting. The inference engine can be used to validate data in code or to include it as part of a code generation pipeline.

Additional resources

The official website, documentation and language specification.