chore: initialize standalone UPM package

Runtime/ShrinkAppBasicStarterSettings.cs

@@ -0,0 +1,17 @@
+#nullable enable
+
+using UnityEngine;
+
+namespace ShrinkApp.Starter.Basic
+{
+    [CreateAssetMenu(fileName = "ShrinkAppBasicStarterSettings", menuName = "ShrinkApp/Starter/Basic Settings")]
+    public class ShrinkAppBasicStarterSettings : ScriptableObject
+    {
+        public bool autoBindLoopbackTransport;
+        public long defaultLoopbackSessionId = 1;
+        public string defaultCommandText = "starter status";
+        public bool logCommandOutputToConsole = true;
+        public bool autoRunDefaultCommandOnStart;
+        public int maxCommandOutputLines = 12;
+    }
+}