MSCO 2.9.1: fixes without MSCLoader, admin teleport, MSCO branding

- Own JSON reader (MiniJson) instead of Newtonsoft.Json - the server browser failed with
  "Could not load System.Runtime.Serialization" once MSCLoader was gone
- Mouse cursor visible in admin menu/chat/console (PlayerInMenu)
- Intro "Press any key" screen replaced by an MSCO loading screen; hook PlayMakerFSM.Awake too
- Join links while the game runs: picked up from MSCO\join.txt (written by the launcher)
- Admin menu: TELEPORT tab (home, shop, repair shop, inspection, villages, events, Satsuma)
- Window title/icon "MSCO - My Summer Car Online", MSCO logo in the main menu
- In-game UI restyled like the keymaster website (rounded cards, pills, glow, slim scrollbars)

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

JoinLinks.cs

@@ -60,6 +60,29 @@ namespace MSCO
             }
         }
 
+        static float nextPoll;
+
+        /// <summary>
+        /// JOIN-Link, während das Spiel schon läuft: der MSCO Launcher legt ihn als &lt;Spiel&gt;\MSCO\join.txt ab (Steam
+        /// gibt Links an ein laufendes Spiel nicht weiter). Einmal pro Sekunde nachsehen.
+        /// </summary>
+        public static bool TryTakeRequest(out string host, out int port)
+        {
+            host = null;
+            port = 0;
+            if (UnityEngine.Time.realtimeSinceStartup < nextPoll) return false;
+            nextPoll = UnityEngine.Time.realtimeSinceStartup + 1f;
+            try
+            {
+                string file = System.IO.Path.Combine(Bootstrap.Folder ?? "", "join.txt");
+                if (Bootstrap.Folder == null || !System.IO.File.Exists(file)) return false;
+                string text = System.IO.File.ReadAllText(file);
+                System.IO.File.Delete(file);
+                return TryParse(text, out host, out port);
+            }
+            catch { return false; }
+        }
+
         /// <summary>Wurde das Spiel über einen JOIN-Link gestartet?</summary>
         public static bool TryGetFromCommandLine(out string host, out int port)
         {