[CHANGE] Library service, db migrations, ui blazor

Manager.App/Services/ILibraryService.cs

@@ -1,6 +1,9 @@
+using DotBased.Monads;
+using Manager.App.Models.Library;
+
 namespace Manager.App.Services;
 
 public interface ILibraryService
 {
-    
+    public Task<Result<LibraryInformation>> GetLibraryInfoAsync(CancellationToken cancellationToken = default);
 }