Adds suppliers feature to application

Introduces comprehensive suppliers management with mock data, localization, and UI components

Implements:
- Suppliers page with data table
- Localization for Danish and English
- Search and filtering functionality
- Responsive table design
- Mock data for initial population

PlanTempus.Application/wwwroot/css/components.css

@@ -353,7 +353,8 @@ swp-status-badge {
     color: var(--color-blue);
   }
 
-  &.employee {
+  &.employee,
+  &.inactive {
     background: var(--color-background-alt);
     color: var(--color-text-secondary);
   }