Make sure '.mono/metadata/' exists before creating file

Fixes #31549

modules/mono/editor/GodotTools/GodotTools/Ides/GodotIdeServer.cs

@@ -9,6 +9,7 @@ using System.Threading.Tasks;
 using GodotTools.IdeConnection;
 using GodotTools.Internals;
 using GodotTools.Utils;
+using Directory = System.IO.Directory;
 using File = System.IO.File;
 using Thread = System.Threading.Thread;
 
@@ -33,6 +34,9 @@ namespace GodotTools.Ides
 
             this.launchIdeAction = launchIdeAction;
 
+            // Make sure the directory exists
+            Directory.CreateDirectory(projectMetadataDir);
+
             // The Godot editor's file system thread can keep the file open for writing, so we are forced to allow write sharing...
             const FileShare metaFileShare = FileShare.ReadWrite;