media management

zero.Core/FileStorage/IFileSystem.cs

@@ -4,6 +4,11 @@ namespace zero.FileStorage;
 
 public interface IFileSystem
 {
+  /// <summary>
+  /// Determines whether a file or directory at the given path already exists
+  /// </summary>
+  Task<bool> Exists(string path, CancellationToken cancellationToken = default);
+
   /// <summary>
   /// Get information of a file
   /// </summary>