Context

It's a little complex to implement autoembedding into the django-mongodb-backend. The best strategy right now is to explore how feasible it is to implement it via this strategy:

• Add an `autoembedding` arg to `VectorSearchIndex`
• Add support for StringField derivatives to `VectorSearchIndex` support
• Extend/Add a new field to `SearchVector` to take string as input

Definition of done

Proof of concept made with feasibility defined. Also show evidence of this working via a demonstrated example.

If it doesn't work, please provide an alternative solution.

Pitfalls

Django is a little finnicky