add new file menu stub

src/SharpIDE.Godot/Features/Common/TreeItemContainer.cs.uid

@@ -0,0 +1 @@
+uid://c3k4fos7lp7oa

src/SharpIDE.Godot/Features/SolutionExplorer/ContextMenus/FileContextMenu.cs

@@ -30,7 +30,7 @@ public partial class SolutionExplorerPanel
             }
             else if (actionId is FileContextMenuOptions.RevealInFileExplorer)
             {
-                OS.ShellOpen(Path.GetDirectoryName(file.Path)!);
+                OS.ShellShowInFileManager(file.Path);
             }
             else if (actionId is FileContextMenuOptions.CopyFullPath)
             {

src/SharpIDE.Godot/Features/SolutionExplorer/ContextMenus/FolderContextMenu.cs

@@ -5,7 +5,14 @@ namespace SharpIDE.Godot.Features.SolutionExplorer;
 
 file enum FolderContextMenuOptions
 {
-    RevealInFileExplorer = 1
+    CreateNew = 1,
+    RevealInFileExplorer = 2
+}
+
+file enum CreateNewSubmenuOptions
+{
+    Directory = 1,
+    CSharpFile = 2
 }
 
 public partial class SolutionExplorerPanel
@@ -14,6 +21,13 @@ public partial class SolutionExplorerPanel
     {
         var menu = new PopupMenu();
         AddChild(menu);
+        
+        var createNewSubmenu = new PopupMenu();
+        menu.AddSubmenuNodeItem("Add", createNewSubmenu, (int)FolderContextMenuOptions.CreateNew);
+        createNewSubmenu.AddItem("Directory", (int)CreateNewSubmenuOptions.Directory);
+        createNewSubmenu.AddItem("C# File", (int)CreateNewSubmenuOptions.CSharpFile);
+        createNewSubmenu.IdPressed += OnCreateNewSubmenuPressed;
+        
         menu.AddItem("Reveal in File Explorer", (int)FolderContextMenuOptions.RevealInFileExplorer);
         menu.PopupHide += () => menu.QueueFree();
         menu.IdPressed += id =>
@@ -29,4 +43,17 @@ public partial class SolutionExplorerPanel
         menu.Position = new Vector2I((int)globalMousePosition.X, (int)globalMousePosition.Y);
         menu.Popup();
     }
+
+    private void OnCreateNewSubmenuPressed(long id)
+    {
+        var actionId = (CreateNewSubmenuOptions)id;
+        if (actionId is CreateNewSubmenuOptions.Directory)
+        {
+            //OpenCreateNewFolderDialog(folder);
+        }
+        else if (actionId is CreateNewSubmenuOptions.CSharpFile)
+        {
+            //OpenCreateNewCSharpFileDialog(folder);
+        }
+    }
 }