fix: added black and flake8 for linting and fixing

requirements.txt

@@ -1,5 +1,7 @@
 bcrypt==4.0.1
+black==23.1.0
 click==8.1.3
+flake8==6.0.0
 Flask==2.2.2
 Flask-SQLAlchemy==3.0.3
 greenlet==2.0.1
@@ -7,7 +9,15 @@ gunicorn==20.1.0
 itsdangerous==2.1.2
 Jinja2==3.1.2
 MarkupSafe==2.1.2
+mccabe==0.7.0
+mypy-extensions==1.0.0
+packaging==23.0
+pathspec==0.11.0
+platformdirs==3.0.0
 psycopg2-binary==2.9.5
+pycodestyle==2.10.0
+pyflakes==3.0.1
 python-dotenv==0.21.1
 SQLAlchemy==1.4.46
+tomli==2.0.1
 Werkzeug==2.2.2