added requirements.txt to be picked up by dependency scanning

requirements.txt

+falcon==3.1.1
+gunicorn==19.9.0
+SQLAlchemy==2.0.1
+pyjwt[crypto] == 2.5.0
+requests >= 2.31.0
+marshmallow >= 3.20.2
\ No newline at end of file

requirements_dev.txt

+pylint
+pytest
+mypy
+types-requests
+coverage
+third-party-license-file-generator
+pylint_junit