Adds Kasse (Cash Register) module and related components

Introduces comprehensive cash management functionality with multiple view components for tracking daily transactions, filtering, and reconciliation

Implements:
- Cash calculation and difference tracking
- Dynamic tab switching
- Checkbox selection and row expansion
- Date filtering and approval mechanisms

PlanTempus.Application/Features/Kasse/Components/KasseNote/Default.cshtml

@@ -0,0 +1,12 @@
+<swp-card>
+    <swp-card-header>
+        <swp-card-title>Note til difference</swp-card-title>
+        <swp-card-action>Valgfrit</swp-card-action>
+    </swp-card-header>
+    <swp-card-content>
+        <swp-note-field>
+            <textarea placeholder="Fx kassedifference, fejlslag, runding osv."></textarea>
+        </swp-note-field>
+        <swp-note-hint>Kan gøres obligatorisk ved difference over 100 kr.</swp-note-hint>
+    </swp-card-content>
+</swp-card>

PlanTempus.Application/Features/Kasse/Components/KasseNote/KasseNoteViewComponent.cs

@@ -0,0 +1,15 @@
+using Microsoft.AspNetCore.Mvc;
+
+namespace PlanTempus.Application.Features.Kasse.Components;
+
+/// <summary>
+/// ViewComponent for the note field.
+/// Optional field for explaining cash differences.
+/// </summary>
+public class KasseNoteViewComponent : ViewComponent
+{
+    public IViewComponentResult Invoke()
+    {
+        return View();
+    }
+}