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>

MSCO.csproj

@@ -42,10 +42,6 @@
       <HintPath>F:\SteamLibrary\steamapps\common\My Summer Car\mysummercar_Data\Managed\UnityEngine.dll</HintPath>
       <Private>False</Private>
     </Reference>
-    <Reference Include="Newtonsoft.Json">
-      <HintPath>lib\Newtonsoft.Json.dll</HintPath>
-      <Private>False</Private>
-    </Reference>
     <Reference Include="Assembly-CSharp-firstpass">
       <HintPath>F:\SteamLibrary\steamapps\common\My Summer Car\mysummercar_Data\Managed\Assembly-CSharp-firstpass.dll</HintPath>
       <Private>False</Private>
@@ -97,6 +93,8 @@
     <Compile Include="LobbyUI.cs" />
     <Compile Include="MenuHelper.cs" />
     <Compile Include="MenuInputBlocker.cs" />
+    <Compile Include="MiniJson.cs" />
+    <Compile Include="MenuBranding.cs" />
     <Compile Include="MSCO.cs" />
     <Compile Include="MultiplayerManager.cs" />
     <Compile Include="NetSession.cs" />
@@ -109,6 +107,9 @@
     <Compile Include="VehicleFx.cs" />
     <Compile Include="WinHttp.cs" />
     <Compile Include="WorldSync.cs" />
+    <EmbeddedResource Include="menu-logo.png">
+      <LogicalName>MSCO.menu-logo.png</LogicalName>
+    </EmbeddedResource>
     <EmbeddedResource Include="logo.png">
       <LogicalName>MSCO.logo.png</LogicalName>
     </EmbeddedResource>