Use existing document types for automatic document types assignment

[nikscha]

Is your feature request related to a problem? Please describe.
Currently, pai doesn't use the existing document types from paperless, instead new ones are made up on the spot.

Describe the solution you'd like
Instead, a list of existing document types should be passed to the llm to choose from.

[clusterzx]

This issue has been marked as stale due to inactivity. Please respond to keep it open.

[clusterzx]

This issue has been closed due to lack of response.