re-organize Nextcloud project structure

Pilz.Networking.CloudProviders.Nextcloud/OCS/OcsApiBase.cs

@@ -0,0 +1,18 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Pilz.Networking.CloudProviders.Nextcloud.OCS
+{
+    public abstract class OcsApiBase
+    {
+        protected OcsApi Manager { get; init; }
+
+        protected OcsApiBase(OcsApi manager)
+        {
+            Manager = manager;
+        }
+    }
+}