MSCO 2.9.0: standalone without MSCLoader (Unity Doorstop)

- Bootstrap: Doorstop entry point, loads Harmony/Newtonsoft from the MSCO folder, hooks
  PlayMakerArrayListProxy.Awake and starts MSCO in the main menu; skips the news screen
- No MSCLoader reference anymore; key bindings in PlayerPrefs, bind console command
- Harmony 1.2 and Newtonsoft.Json in lib/ (MIT notices); build copies to <game>\MSCO
- README/CHANGELOG updated

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

InputLock.cs

@@ -2,7 +2,6 @@ using System;
 using System.Collections.Generic;
 using System.Reflection;
 using Harmony;
-using MSCLoader;
 using UnityEngine;
 
 namespace MSCO