…CohereAI and ShuttleAI

- Grouped packages by categories for better readability.
- Updated package versions to the latest available from PyPI.
- Applied changes to requirements.txt and requirements.lite.txt

- use: `conda env create -f environment.yml`

- Created a new `rag_api` directory to keep related parts of the code together.
- Created subdirectories within `rag_api` to group related modules.

This should make the code easier to understand and work with as the project grows!