add delete directory

src/SharpIDE.Application/Features/FileWatching/IdeFileOperationsService.cs

@@ -12,4 +12,10 @@ public class IdeFileOperationsService(SharpIdeSolutionModificationService sharpI
 		Directory.CreateDirectory(newDirectoryPath);
 		var newFolder = await _sharpIdeSolutionModificationService.AddDirectory(parentFolder, newDirectoryName);
 	}
+
+	public async Task DeleteDirectory(SharpIdeFolder folder)
+	{
+		Directory.Delete(folder.Path, true);
+		await _sharpIdeSolutionModificationService.RemoveDirectory(folder);
+	}
 }

src/SharpIDE.Application/Features/FileWatching/SharpIdeSolutionModificationService.cs

@@ -17,4 +17,11 @@ public class SharpIdeSolutionModificationService
 		SolutionModel.AllFolders.Add(sharpIdeFolder);
 		return sharpIdeFolder;
 	}
+
+	public async Task RemoveDirectory(SharpIdeFolder folder)
+	{
+		var parentFolderOrProject = (IFolderOrProject)folder.Parent;
+		parentFolderOrProject.Folders.Remove(folder);
+		SolutionModel.AllFolders.Remove(folder);
+	}
 }

src/SharpIDE.Application/Features/SolutionDiscovery/SharpIdeFolder.cs

@@ -5,7 +5,7 @@ using SharpIDE.Application.Features.SolutionDiscovery.VsPersistence;
 
 namespace SharpIDE.Application.Features.SolutionDiscovery;
 
-public class SharpIdeFolder : ISharpIdeNode, IExpandableSharpIdeNode, IChildSharpIdeNode
+public class SharpIdeFolder : ISharpIdeNode, IExpandableSharpIdeNode, IChildSharpIdeNode, IFolderOrProject
 {
 	public required IExpandableSharpIdeNode Parent { get; set; }
 	public required string Path { get; set; }

src/SharpIDE.Application/Features/SolutionDiscovery/VsPersistence/SharpIdeModels.cs

@@ -14,6 +14,12 @@ public interface IExpandableSharpIdeNode
 {
 	public bool Expanded { get; set; }
 }
+
+public interface IFolderOrProject
+{
+	public ObservableHashSet<SharpIdeFolder> Folders { get; init; }
+	public ObservableHashSet<SharpIdeFile> Files { get; init; }
+}
 public interface IChildSharpIdeNode
 {
 	public IExpandableSharpIdeNode Parent { get; set; }