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/Features/Suppliers/Components/SupplierTable/SupplierTableViewComponent.cs

@@ -0,0 +1,116 @@
+using System.Globalization;
+using System.Text.Json;
+using Microsoft.AspNetCore.Mvc;
+using PlanTempus.Application.Features.Localization.Services;
+
+namespace PlanTempus.Application.Features.Suppliers.Components;
+
+public class SupplierTableViewComponent : ViewComponent
+{
+    private readonly ILocalizationService _localization;
+    private readonly IWebHostEnvironment _env;
+
+    public SupplierTableViewComponent(ILocalizationService localization, IWebHostEnvironment env)
+    {
+        _localization = localization;
+        _env = env;
+    }
+
+    public IViewComponentResult Invoke()
+    {
+        var data = LoadSupplierData();
+        var model = new SupplierTableViewModel
+        {
+            SearchPlaceholder = _localization.Get("suppliers.searchPlaceholder"),
+            ExportButtonText = _localization.Get("suppliers.export"),
+            CreateButtonText = _localization.Get("suppliers.create"),
+            ColumnSupplier = _localization.Get("suppliers.column.supplier"),
+            ColumnContact = _localization.Get("suppliers.column.contact"),
+            ColumnProducts = _localization.Get("suppliers.column.products"),
+            ColumnLastOrder = _localization.Get("suppliers.column.lastOrder"),
+            ColumnStatus = _localization.Get("suppliers.column.status"),
+            EmptySearchText = _localization.Get("suppliers.emptySearch"),
+            Suppliers = data.Suppliers
+                .OrderBy(s => s.Name)
+                .Select(s => new SupplierItemViewModel
+                {
+                    Id = s.Id,
+                    Name = s.Name,
+                    City = s.City,
+                    ContactPerson = s.ContactPerson,
+                    ProductCount = s.ProductCount,
+                    LastOrderDate = FormatLastOrder(s.LastOrder),
+                    IsActive = s.IsActive,
+                    StatusClass = s.IsActive ? "active" : "inactive",
+                    StatusText = s.IsActive
+                        ? _localization.Get("suppliers.status.active")
+                        : _localization.Get("suppliers.status.inactive")
+                })
+                .ToList()
+        };
+
+        return View(model);
+    }
+
+    private SupplierMockData LoadSupplierData()
+    {
+        var jsonPath = Path.Combine(_env.ContentRootPath, "Features", "Suppliers", "Data", "suppliersMock.json");
+        var json = System.IO.File.ReadAllText(jsonPath);
+        return JsonSerializer.Deserialize<SupplierMockData>(json, new JsonSerializerOptions
+        {
+            PropertyNameCaseInsensitive = true
+        }) ?? new SupplierMockData();
+    }
+
+    private static string FormatLastOrder(string dateStr)
+    {
+        if (DateTime.TryParse(dateStr, out var date))
+        {
+            return date.ToString("d. MMMM yyyy", new CultureInfo("da-DK"));
+        }
+        return dateStr;
+    }
+}
+
+public class SupplierTableViewModel
+{
+    public required string SearchPlaceholder { get; init; }
+    public required string ExportButtonText { get; init; }
+    public required string CreateButtonText { get; init; }
+    public required string ColumnSupplier { get; init; }
+    public required string ColumnContact { get; init; }
+    public required string ColumnProducts { get; init; }
+    public required string ColumnLastOrder { get; init; }
+    public required string ColumnStatus { get; init; }
+    public required string EmptySearchText { get; init; }
+    public required IReadOnlyList<SupplierItemViewModel> Suppliers { get; init; }
+}
+
+public class SupplierItemViewModel
+{
+    public required string Id { get; init; }
+    public required string Name { get; init; }
+    public required string City { get; init; }
+    public required string ContactPerson { get; init; }
+    public int ProductCount { get; init; }
+    public required string LastOrderDate { get; init; }
+    public bool IsActive { get; init; }
+    public required string StatusClass { get; init; }
+    public required string StatusText { get; init; }
+}
+
+internal class SupplierMockData
+{
+    public List<SupplierData> Suppliers { get; set; } = new();
+}
+
+internal class SupplierData
+{
+    public string Id { get; set; } = "";
+    public string Name { get; set; } = "";
+    public string City { get; set; } = "";
+    public string ContactPerson { get; set; } = "";
+    public int ProductCount { get; set; }
+    public string LastOrder { get; set; } = "";
+    public bool IsActive { get; set; }
+}