feat: document upload and vector store

[RobinBially]

related to pull request #125

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

Pipelines cannot be used with documents from the web ui.

Describe the solution you'd like

Interceptor for the store_data_in_vector_db function in backend/apps/rag/main.py calling an endpoint in the pipelines project if a config variable is set to true
Since this was rejected, the alternative will be implemented

Describe alternatives you've considered

Implement Open AI files and vector store API instead

Additional context

[RobinBially]

Since the pull request was closed, I am going to implement the official files and vector store api. I hope this is wanted @tjbck

[tjbck]

Sounds like a good direction to push this project! I'll also take a look when I can and provide feedback. Embeddings api would also still be helpful here!