Fix requirements management

[cise-midoglu]

• [ ] Poetry (TOML file)
• [x] requirements.txt

[cise-midoglu]

Poetry:

• https://python-poetry.org/docs/basic-usage/
• Document how to update the requirements through poetry when new libraries are added locally.
• Check if we can completely get rid of the requirements.txt file (e.g., would Streamlit still work)