Update the requirements, fix the notebook and improve the readme

chore: fix python version server

chore: update title in app.py

chore: update concrete-ml and smooth UI

chore: update the banner and community link

fix: tmp directory

chore: fix UI markdown and enable clean old keys

chore: update UI with step numbering

chore: update images zama

chore: update gradio and add error message when wrong order execution

chore: fix typo

init sentiment analysis in FHE