Fix: Adding dotenv for environment variable loading

Update README.md

Merge branch 'main' of https://github.com/Sh-31/CourseTA

clean

Update README.md

Update README.md

Updates README with architectural details and API enhancements

Updates off-topic response handling and renames a node for better clarity

Adds file text extraction and error handling for summarization streams

Removes Tavily API key setting

update gradio gui

docs: Add FFmpeg and Ollama setup instructions, update dependencies

initial commit

Initial commit