feat: Implement file management and authorization features

- Add RequiresPermissionAttribute for gRPC method access control.
- Create IFileManagementService interface for file upload and management.
- Implement AddProductImageCommand and handler for adding product images.
- Implement CreateNewProductsCommand and handler for creating new products with image uploads.
- Implement DeleteProductsCommand and handler for deleting products and their associations.
- Implement RemoveProductImageCommand and handler for removing product images from galleries.
- Implement UpdateProductsCommand and handler for updating product details and images.
- Create GetProductGalleryQuery and handler for retrieving product galleries.
- Implement PermissionService for role-based access control using JWT claims.
- Implement FileManagementService for handling file uploads and image optimization.
- Define gRPC service and messages for file management in fms.proto.
- Add FluentValidation for request validation in various commands.
- Create PermissionInterceptor for enforcing permissions on gRPC methods.

src/CMSMicroservice.Application/Common/Authorization/RequiresPermissionAttribute.cs

@@ -0,0 +1,15 @@
+namespace CMSMicroservice.Application.Common.Authorization;
+
+/// <summary>
+/// Attribute برای مشخص کردن مجوز لازم برای دسترسی به یک متد gRPC
+/// </summary>
+[AttributeUsage(AttributeTargets.Class | AttributeTargets.Method, AllowMultiple = true)]
+public sealed class RequiresPermissionAttribute : Attribute
+{
+    public RequiresPermissionAttribute(string permission)
+    {
+        Permission = permission ?? throw new ArgumentNullException(nameof(permission));
+    }
+
+    public string Permission { get; }
+}