Role management preview, recipe validation & system count quota

What's Changed

New features

• ROLEX-2298: Introduce roles UI preview based on mock-API including roles list and details view
• ROLEX-2243: Introduce mandatory module-update-definitions validator to ensure recipe completeness
• ROLEX-2272: Introduce maximum system-count quota

Improvements

• ROLEX-2300: Fix alignment of + assign tag button in recipe details
• ROLEX-2304: Fix column selector for modules list in system details view is cut off when list is too short