Upgrade eventyay-video to a Single Page Application

This project upgrades the eventyay video frontend into a modern Single Page Application integrated with ENext . It solves issues like outdated state management, inefficient routing, and the lack of an admin dashboard by introducing a centralized state system, optimized routing, and Vue 3 Composition API. Key deliverables include a real time organiser dashboard, improved performance, and added testing and CI for a more reliable and maintainable platform.