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/ts/app.ts

@@ -14,6 +14,7 @@ import { EmployeesController } from './modules/employees';
 import { ControlsController } from './modules/controls';
 import { ServicesController } from './modules/services';
 import { CustomersController } from './modules/customers';
+import { SuppliersController } from './modules/suppliers';
 import { TrackingController } from './modules/tracking';
 import { ReportsController } from './modules/reports';
 
@@ -31,6 +32,7 @@ export class App {
   readonly controls: ControlsController;
   readonly services: ServicesController;
   readonly customers: CustomersController;
+  readonly suppliers: SuppliersController;
   readonly tracking: TrackingController;
   readonly reports: ReportsController;
 
@@ -46,6 +48,7 @@ export class App {
     this.controls = new ControlsController();
     this.services = new ServicesController();
     this.customers = new CustomersController();
+    this.suppliers = new SuppliersController();
     this.tracking = new TrackingController();
     this.reports = new ReportsController();
   }