Adds salary specifications with detailed accordion view

Introduces new salary specification feature with interactive accordion component

Implements detailed salary breakdown including:
- Salary specification JSON data model
- Salary specification page with printable view
- Accordion component for expanding/collapsing salary details
- Localization support for new salary labels

Enhances employee salary transparency and detail presentation

PlanTempus.Application/wwwroot/ts/modules/employees.ts

@@ -1,4 +1,5 @@
 import { createChart } from '@sevenweirdpeople/swp-charting';
+import { Accordion, initAccordions } from './accordion';
 
 /**
  * Employees Controller
@@ -72,6 +73,7 @@ export class EmployeesController {
   private ratesSync: RatesSyncController | null = null;
   private scheduleController: ScheduleController | null = null;
   private statsController: EmployeeStatsController | null = null;
+  private salaryAccordions: Accordion[] = [];
   private listView: HTMLElement | null = null;
   private detailView: HTMLElement | null = null;
 
@@ -91,6 +93,20 @@ export class EmployeesController {
     this.ratesSync = new RatesSyncController();
     this.scheduleController = new ScheduleController();
     this.statsController = new EmployeeStatsController();
+    this.initSalaryAccordions();
+  }
+
+  /**
+   * Initialize salary accordions when they exist
+   */
+  private initSalaryAccordions(): void {
+    // Initialize all accordions in the salary tab
+    const salaryTab = document.querySelector('swp-tab-content[data-tab="salary"]');
+    if (salaryTab) {
+      salaryTab.querySelectorAll<HTMLElement>('swp-accordion').forEach(accordion => {
+        this.salaryAccordions.push(new Accordion(accordion, { singleOpen: true }));
+      });
+    }
   }
 
   /**