feat: implementing LoginSecurity class for user authentication

feat: configure user authentication and permissions with Spring Security

build: added Spring Security dependency

feat: implementing index page for each user role

feat: implementing user activation functionality

feat: updating role persistence logic for users

feat: implementing checkbox role assignment form update

feat: implementing validations for user registration

feat: implementing DataLoader component

feat: implementing many-to-many relationship between User and Role

feat: implementing Role entity and Repository

feat: implementing user update

feat: implementing user delete

feat: implementing user listing

Initial commit