[PM-22105] Extract CollectionService.SaveAsync into commands (#5959)

* Add CreateCollectionCommand and associated interface with validation logic

* Implement CreateCollectionCommand to handle collection creation with organization checks and access permissions.
* Introduce ICreateCollectionCommand interface for defining the collection creation contract.
* Add unit tests for CreateCollectionCommand to validate various scenarios including permission checks and error handling.

* Add UpdateCollectionCommand and associated interface with validation logic

* Implement UpdateCollectionCommand to handle collection updates with organization checks and access permissions.
* Introduce IUpdateCollectionCommand interface for defining the collection update contract.
* Add unit tests for UpdateCollectionCommand to validate various scenarios including permission checks and error handling.

* Add scoped services for collection commands

* Register ICreateCollectionCommand and IUpdateCollectionCommand in the service collection for handling collection creation and updates.

* Refactor CollectionsController to use command interfaces for collection creation and updates

* Updated CollectionsController to utilize ICreateCollectionCommand and IUpdateCollectionCommand for handling collection creation and updates, replacing calls to ICollectionService.
* Adjusted related unit tests to verify the new command implementations.

* Refactor ICollectionService and CollectionService to remove SaveAsync method

* Removed the SaveAsync method from ICollectionService and its implementation in CollectionService.
* Updated related tests in CollectionServiceTests to reflect the removal of SaveAsync, ensuring existing functionality remains intact.

* Remove unused organization repository dependency from CollectionServiceTests

src/Core/OrganizationFeatures/OrganizationServiceCollectionExtensions.cs

@@ -143,6 +143,8 @@ public static class OrganizationServiceCollectionExtensions
 
     public static void AddOrganizationCollectionCommands(this IServiceCollection services)
     {
+        services.AddScoped<ICreateCollectionCommand, CreateCollectionCommand>();
+        services.AddScoped<IUpdateCollectionCommand, UpdateCollectionCommand>();
         services.AddScoped<IDeleteCollectionCommand, DeleteCollectionCommand>();
         services.AddScoped<IBulkAddCollectionAccessCommand, BulkAddCollectionAccessCommand>();
     }