added try except to groq_api_key

Changed the files by removing secrets , now it works with normal streamlit run app.py only

changed the model to llama-3.1-8b-instant , added secrets to initialize groq_api_key

updated llama-3.1-70b-versatile -> llama-3.3-70b-versatile | depriciated in extraction.py & llama3-70b-8192 -> mixtral-8x7b-32768 | stopped the support for json, in resume_advance..

implemented groq_api_key in try except for extraction.py only

Updated the groq_api to deploy in the streamlit

Initial commit with app.py, cv_question.py , cv_short.py, extraction.py