Feature/hu 03 change password

[SebastianLopezO]

Implement secure JWT encryption using SECURITY_AES_KEY and add Change Password feature

• Added AESEncryptionService to securely encrypt and decrypt JWT tokens using the SECURITY_AES_KEY environment variable.
• Updated JwtService and JwtServiceI interface to support encryption mechanisms, preventing token decryption by third parties.
• Implemented the missing register(UserDTO) method in JwtService to resolve build issues.
• Introduced ResetTokenDTO to encapsulate reset token data for secure password recovery.
• Extended AuthController to support secure password change and token validation flow.
• Fixed mapping warnings in MUser.java (userRole, role) and MCrop.java (cropStatus, cropType, status, type).
• Noted deprecated API usage in SecurityConfiguration.java; consider recompiling with -Xlint:deprecation.