How to add table annotations serialization.

### Question

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Hi everyone,

I have gone through the docling documentation and found this article [table exportation](https://docling-project.github.io/docling/examples/export_tables/) to get the different tables based on which I wrote a code for an LLM to generate a caption (though getting some context for example text data regarding the page from which the table is found could really be a plus). I will like to do something similar to the picture annotation serialization provided here [image annotation serialization](https://docling-project.github.io/docling/examples/serialization/#creating-a-custom-serializer) but for the generated table captions (annotations). I noticed that the TableItems objects have a captions field. Any help is appreciated thanks.