add rasa and restructure project base

.gitignore

app/README.md

app/app.py

app/static/icons/favicon.ico

app/templates/index.html

rasa/actions/__init__.py

rasa/actions/__pycache__/__init__.cpython-310.pyc

rasa/actions/__pycache__/actions.cpython-310.pyc

rasa/actions/actions.py

rasa/config.yml

rasa/credentials.yml

rasa/data/nlu.yml

rasa/data/rules.yml

rasa/data/stories.yml

rasa/domain.yml

rasa/endpoints.yml

rasa/tests/test_stories.yml