fix: migrate input handling to new Unity InputSystem

💘 Generated with Crush

Assisted-by: Gemini 3.1 Pro (Optimized for Coding Agents) via Crush <crush@charm.land>

src/GameLayer/Bootstrap/GregCoreLoader.cs

@@ -25,7 +25,7 @@ public sealed class GregCoreLoader : MelonMod
 
     public override void OnUpdate()
     {
-        if (global::UnityEngine.Input.GetKeyDown(global::UnityEngine.KeyCode.P))
+        if (global::UnityEngine.InputSystem.Keyboard.current != null && global::UnityEngine.InputSystem.Keyboard.current.pKey.wasPressedThisFrame)
         {
             global::gregCore.Infrastructure.UI.GregDevConsole.Instance.Toggle();
         }

src/gregCore.csproj

@@ -72,6 +72,11 @@
       <HintPath Condition="'$(CI)' == 'true'">$(RepoRoot)\ci-stubs\UnityEngine.InputLegacyModule.dll</HintPath>
       <Private>False</Private>
     </Reference>
+    <Reference Include="Unity.InputSystem">
+      <HintPath Condition="'$(CI)' != 'true'">$(MELON_BASE_DIR)\Il2CppAssemblies\Unity.InputSystem.dll</HintPath>
+      <HintPath Condition="'$(CI)' == 'true'">$(RepoRoot)\ci-stubs\Unity.InputSystem.dll</HintPath>
+      <Private>False</Private>
+    </Reference>
   </ItemGroup>
 
   <ItemGroup>