* Extended functionalities

* Added different UIs

MealPlan.Api/Services/IRecipeExcelService.cs

@@ -0,0 +1,12 @@
+using MealPlan.Api.DTOs.Recipe;
+
+namespace MealPlan.Api.Services;
+
+public interface IRecipeExcelService
+{
+    /// <summary>Generates a blank .xlsx template with Recipes, Ingredients, and Steps sheets.</summary>
+    byte[] GenerateTemplate();
+
+    /// <summary>Parses an uploaded workbook and creates recipes in the database.</summary>
+    Task<RecipeImportResultDto> ImportAsync(Stream fileStream, CancellationToken ct = default);
+}