Use Refit for APIs, make data/API stack async

Start/Shared/Api/IBookmarkContainersApi.cs

@@ -0,0 +1,21 @@
+using System.Collections.Generic;
+using System.Net.Http;
+using System.Threading.Tasks;
+using Refit;
+
+namespace Start.Shared.Api {
+	public interface IBookmarkContainersApi {
+		[Get("/")]
+		Task<ApiResponse<IEnumerable<BookmarkContainerDto>>> GetAllBookmarkContainers();
+
+		[Get("/{bookmarkContainerId}")]
+		Task<ApiResponse<BookmarkContainerDto?>> GetBookmarkContainer(int bookmarkContainerId);
+
+		[Post("/Create")]
+		Task<ApiResponse<BookmarkContainerDto?>> CreateBookmarkContainer(
+			[Body(BodySerializationMethod.Serialized)] string title);
+
+		[Delete("/Delete/{bookmarkContainerId}")]
+		Task<HttpResponseMessage> DeleteBookmarkContainer(int bookmarkContainerId);
+	}
+}

Start/Shared/Api/IBookmarksApi.cs

@@ -0,0 +1,15 @@
+using System.Threading.Tasks;
+using Refit;
+
+namespace Start.Shared.Api {
+	public interface IBookmarksApi {
+		[Get("{bookmarkId}")]
+		Task<BookmarkDto?> GetBookmark(int bookmarkId);
+
+		[Post("/Create")]
+		Task CreateBookmark(string title, string url, string? notes, int bookmarkGroupId);
+
+		[Delete("/Delete/{bookmarkId}")]
+		Task DeleteBookmark(int bookmarkId);
+	}
+}

Start/Shared/Start.Shared.csproj

@@ -9,4 +9,14 @@
   <ItemGroup>
     <SupportedPlatform Include="browser" />
   </ItemGroup>
+  <ItemGroup>
+    <None Remove="Refit" />
+    <None Remove="Api\" />
+  </ItemGroup>
+  <ItemGroup>
+    <Folder Include="Api\" />
+  </ItemGroup>
+  <ItemGroup>
+    <PackageReference Include="Refit" Version="6.1.15" />
+  </ItemGroup>
 </Project>