* feat: added Sidebar with unit info
* feat: added unit location
* refactor: added legacy behavior
* feat: added live variant
* refactor: code refactoring
* feat: added tests and translations
* feat: added new font size
* refactor: after review
* feat: Course unit - add new component section
* feat: Course unit - make Discussion and Drag-and-Drop button functional
* feat: Course unit - make Problem button functional
* feat: Unit page - make Video button functional