Implement forgot/reset password endpoints

[edulauer]

Implement reset password function in API:

• Introduce a new smtp4dev container for development deployment in docker-compose
• Include fastapi-mail 1.4.1 in requirements.txt
• Establish the email_config.py file containing SMTP environment variables and email templates.
• Develop methods for forgot password (sending a email to the user with a token) and reset password (resetting the password using the token)
• Create tests for forgot_password

TODO:

• Create tests for reset_password (needs to catch the token in the email body)