feat(ui): Build registration and login forms

[Zafar7645]

User Story: As a user, I want a clean and intuitive interface to register for a new account or log into my existing one.

Acceptance Criteria:

• Create an AuthModule in the Angular application with routes for /login and /register.
• Build the registration form using Angular Reactive Forms with fields for name, email, and password.
• Implement client-side validation for all fields (e.g., required, valid email, password strength).
• Build the login form with fields for email and password.
• Create an AuthService to handle API calls to the backend for both registration and login.
• On successful login, store the received JWT securely (e.g., in localStorage) and navigate the user to the main dashboard.
• Display clear error messages from the API on the UI.