Is your feature request related to a problem? Please describe.

Since document-intelligence will be the successor of form recognizer I already looked into the migration path and did some testing.
During my testing I noticed the lag of types, which were available for form recognizer in the samples/prebuilt folder.
The samples for document-intelligence mention the following:

// Use of PrebuiltModels.Receipt above (rather than the raw model ID), adds strong typing of the model's output

But I dont know where I can find the mentioned types.

Describe the solution you'd like

A similar solution as we had before with form recognizer or a even more deeply integrated type system for prebuilt models.

Describe alternatives you've considered

Doing the types manually, but I would prefer a central solution.