Reapply "S3 Test"

This reverts commit 35f4133001.

Services/IStorageService.cs

@@ -0,0 +1,12 @@
+
+using Pldpro.Web.Services.Models;
+
+namespace Pldpro.Web.Services;
+
+public interface IStorageService
+{
+    Task<IEnumerable<BucketItem>> ListBucketsAsync(CancellationToken ct = default);
+    Task CreateBucketAsync(string bucketName, CancellationToken ct = default);
+    Task<IEnumerable<ObjectItem>> ListObjectsAsync(string bucket, CancellationToken ct = default);
+    Task UploadObjectAsync(string bucket, string key, Stream content, string contentType, CancellationToken ct = default);
+}