Implement LLM with RAG PoC with LangChain

I need a freelencer who will implement a code in Google Colabolatory that will use RAG. All should work using Langchain.

To be more precise the code should:
1. Get data from a web page i will provide awarded person
2. Chunk correctly data and save in database (Vector Chroma preferably).
3. Use GPT-4o with latest embedding from OpenAI
4. Use latest Langchain version
5. Use RAG to answer questions,
6. Remember context of dialog
7. As promt input it should be able to get text and file from user (PDF, Word File, JPG) and generate answet based on it.

I need the code to be done within 48h.
Code should be easy to understand, well commented. All in accordance to Google Python Stylesheet