Feat/backend/setup nodemailer email confirmation password recovery

[yumeangelica]

• Implemented email confirmation and password reset functionality:
  • Generate and send email confirmation token on user creation
  • Request password reset and verify email/password reset tokens
  • Resend email confirmation
• Updated user model with fields and methods for email confirmation and password reset
• Added routes for email verification, resending confirmation, and password reset
• Configured Nodemailer for email confirmation and password recovery
• Added environment variables for email service configuration
• Included Nodemailer dependency
• Minor version update for the backend
• Added scripts for version push
• Created a file for version number increment in backend or frontend