- add: Service think

Nebula.Launcher/FileApis/Interfaces/IWriteFileApi.cs

@@ -0,0 +1,10 @@
+using System.IO;
+
+namespace Nebula.Launcher.FileApis.Interfaces;
+
+public interface IWriteFileApi
+{
+    public bool Save(string path, Stream input);
+    public bool Remove(string path);
+    public bool Has(string path);
+}