added base diagnose, is not working, yet, still contains test objects

Moonlight.ApiServer/Implementations/Diagnose/CoreDiagnoseProvider.cs

@@ -0,0 +1,16 @@
+using System.Text;
+using Moonlight.ApiServer.Interfaces;
+using Moonlight.ApiServer.Models.Diagnose;
+
+namespace Moonlight.ApiServer.Implementations.Diagnose;
+
+public class CoreDiagnoseProvider : IDiagnoseProvider
+{
+    public async Task<DiagnoseEntry> GetFiles()
+    {
+        return new DiagnoseFile()
+        {
+            GetContent = () => Encoding.UTF8.GetBytes("hello world")
+        };
+    }
+}