Refactor imports and update AI provider handling in app.py; modify requirements.txt for package consistency

Update models

Add support for groq

Update API key in .env.example file

Rearranged import statements in app.py

add default value

Update text display to markdown format

Add streamlit to requirements.txt

Update title and emoji in README.md

Refactor AI provider selection and update dependencies

Add .env.example and .gitignore files

Add strftime AI application code and dependencies

initial commit