add services

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

@@ -0,0 +1,18 @@
+using SharpIDE.Application.Features.SolutionDiscovery;
+using SharpIDE.Application.Features.SolutionDiscovery.VsPersistence;
+
+namespace SharpIDE.Application.Features.FileWatching;
+
+public class SharpIdeSolutionModificationService
+{
+	public SharpIdeSolutionModel SolutionModel { get; set; } = null!;
+
+	public async Task<SharpIdeFolder> CreateDirectory(SharpIdeFolder parentFolder, string directoryPath)
+	{
+		// Passing [] to allFiles and allFolders, as we assume that a brand new folder has no subfolders or files yet
+		var sharpIdeFolder = new SharpIdeFolder(new DirectoryInfo(directoryPath), parentFolder, [], []);
+		parentFolder.Folders.Add(sharpIdeFolder);
+		SolutionModel.AllFolders.Add(sharpIdeFolder);
+		return sharpIdeFolder;
+	}
+}