Is your feature request related to a problem? Please describe.
For those creating chatbots and voice assistants, the Jovo Framework is a beloved open source framework. Among the possible NLU's supported is NLP.js. Currently it only supports enum entities and it would be great if it could also handle regex and builtin entities.

Describe the solution you'd like
I created a ticket for the Jovo Framework which would be easy for one of the contributors to NLP.js to tackle.
jovotech/jovo-model#71
I could be a point of contact to help get you setup with Jovo v4 and help in any design discussions.

Describe alternatives you've considered
The only alternative is to find someone with practical experience using NLP.js to help solve this.

Additional context
Here are a few key place in Jovo that talk about NLP.js:

• Jovo has a model format that can convert into a corpus file: https://github.com/jovotech/jovo-model/tree/8880b156132871a2a4a4dc6369352f553f5ac2dc/packages/jovo-model-nlpjs
• Here is Jovo's implementation of NLP.js to fit into their framework: https://github.com/jovotech/jovo-framework/tree/v4/latest/integrations/nlu-nlpjs
• The Jovo Debugger uses NLP.js by default: https://github.com/jovotech/jovo-framework/blob/b56224cb102e934245178c7bf403814d1aa5f0c9/integrations/plugin-debugger/src/JovoDebugger.ts#L64-L84
• Here is a sample project that you can interact with using the Jovo Debugger that needs builin types for number, date: https://github.com/jovo-community/jovo4-component-playground