This commit introduces user data management with the addition of new interfaces and services. User data interface which defines the structure of user data was created. Account handler service for registering, logging in, updating user data and disconnecting was also added. User data provider component was created for managing user data state. The account info component for displaying and editing the user account was introduced too. Finally, updates were made in the existing components and services for accommodating these new elements.
Introduced two new components: Footer and Header. The Footer includes copyright and navigation links, while the Header contains the site's logo, title, and a theme selector.
