Implement Basic Authentication with Username & Password

[datagero]

Objective: Allow external users to access the tool by logging in with a provided username and password.

Details:
• Implement a basic login page.
• Integrate backend authentication endpoints.
• Set up session management to maintain user sessions securely.
• Explore options for password encryption.

Dependencies: N/A - will later integrate with OpenShift environment.

Acceptance Criteria:
• Users can log in with a username and password (pre-created users, no need to register).
• Sessions persist across interactions.

Priority: High
Estimated Effort: TBC