Initial commit: AIGame Unity client with URP, HybridCLR, YooAsset and tooling.

Co-authored-by: Cursor <cursoragent@cursor.com>

AIClient/Packages/com.unity.pipeline/Runtime/IlInterpreter/MarshalFrameAllocator.cs

@@ -0,0 +1,23 @@
+#nullable enable
+using System;
+using System.Collections.Generic;
+using System.Runtime.InteropServices;
+
+namespace IlInterpreter.Interpreter
+{
+
+// Default frame allocator used outside Unity (and anywhere a host doesn't inject its own).
+// Marshal.AllocHGlobal is platform-neutral and AOT/IL2CPP-safe, and keeps the engine free of
+// any Unity.Collections dependency. Returns 8-byte-aligned memory on all supported runtimes.
+sealed unsafe class MarshalFrameAllocator : IFrameAllocator
+{
+    public static readonly MarshalFrameAllocator Instance = new();
+
+    public void* Alloc(int byteCount) => (void*)Marshal.AllocHGlobal(byteCount);
+
+    public void Free(void* ptr)
+    {
+        if (ptr != null) Marshal.FreeHGlobal((nint)ptr);
+    }
+}
+}