Sanitise inputs from user

[sirnails]

need to add input sanitiation

e.g. sanitizeInput($data) { return htmlspecialchars(strip_tags(trim($data)), ENT_QUOTES, 'UTF-8');

[sirnails]

feat: Enhance security by sanitizing and validating GET and POST parameters

• Added SanitizationHelper and InputHelper to sanitize inputs across the application.
• Sanitized $_POST data in UserController and QuoteController methods to prevent XSS and other injection attacks.
• Sanitized $_GET parameters in index.php and QuoteController to ensure valid and safe input.
• Ensured all CSRF tokens are checked before processing POST requests.
• Updated session settings for improved security.

This commit enhances the overall security by ensuring all user inputs are properly sanitized and validated before being used in the application logic.