Command execution, CreateContainer command WIP

src/Core/FileTime.Core.Abstraction/Command/ICommandHandler.cs

@@ -0,0 +1,9 @@
+using FileTime.Core.Timeline;
+
+namespace FileTime.Core.Command;
+
+public interface ICommandHandler
+{
+    bool CanHandle(ICommand command);
+    Task ExecuteAsync(ICommand command);
+}