Integration of Security Issues in README

[viktech123]

Explain in the README:

• Absence of state management
• Absence of intialisation and clearing of sensitive data
• No use of custom exceptions
• No use of try-catch for exception handling
• No fault induction check
• No authentication and authorisation mechanisms
• No memory intialisation
• No bound checking
• No secure protocol used
• Use of weak cryptographic algorithms

[aki8]

Readme file is updated with explanations