[Chore] Migrate Python document processor to be like AnythingLLM document processor

[huicewang]

Can the current document processor use the document processor from anythingllm?
I suggest that the document processor for Python could be standardized to be consistent with anythingllm.

[timothycarambat]

This is something that is in our backlog. Usually, we do things on AnythingLLM and then move them into VectorAdmin once we know it to be working!

We will drop the python document processor soon and it will be replaced with an alike branch from anythingllm