feat StayExport - Added LocalizerService

- Added new "LocalizerService" to get localization for enum values (and other dynamic/db values in the future).

src/Somnia.GuestLog/Services/LocalizerService.cs

@@ -0,0 +1,37 @@
+using Microsoft.Extensions.Localization;
+using Somnia.GuestLog.Resources;
+
+namespace Somnia.GuestLog.Services;
+
+public class LocalizerService(
+    IServiceProvider serviceProvider
+) : ILocalizerService
+{
+    private IStringLocalizer<LanguageLocale> Localizer
+    {
+        get
+        {
+            field ??= serviceProvider.GetRequiredService<IStringLocalizer<LanguageLocale>>();
+            return field;
+        }
+    }
+
+    public string GetEnumValue<TEnum>(TEnum? enumValue) where TEnum : struct, Enum
+    {
+        if (enumValue == null)
+        {
+            return GuestConsts.EmptyField;
+        }
+
+        return GetEnumValue(enumValue.Value);
+    }
+
+    public string GetEnumValue<TEnum>(TEnum enumValue) where TEnum : struct, Enum
+    {
+        string enumName = typeof(TEnum).Name;
+        string? strEnumValue = Enum.GetName(enumValue);
+        string localeKey = $"enum.{enumName}.{strEnumValue}";
+
+        return Localizer[localeKey];
+    }
+}