Add KosmicKrisp translation layer for macOS 26+

- Mesa 26.0 introduced KosmicKrisp, a Vulkan-on-Metal translation layer and the eventual successor to MoltenVK

src/Ryujinx.Graphics.Vulkan/VulkanSpbApi.cs

@@ -0,0 +1,34 @@
+using Silk.NET.Core.Contexts;
+using Silk.NET.Vulkan;
+using SPB.Graphics.Vulkan;
+
+namespace Ryujinx.Graphics.Vulkan
+{
+    public static class VulkanSpbApi
+    {
+        public static Vk GetApiFromSpb()
+        {
+            LamdaNativeContext baseCtx = new(VulkanHelper.GetProcAddress);
+            MultiNativeContext ctx = new(baseCtx, null);
+            Vk ret = new(ctx);
+
+            ctx.Contexts[1] = new LamdaNativeContext(x =>
+            {
+                if (x.EndsWith("ProcAddr"))
+                {
+                    return default;
+                }
+
+                nint ptr = ret.GetDeviceProcAddr(ret.CurrentDevice.GetValueOrDefault(), x);
+                if (ptr != default)
+                {
+                    return ptr;
+                }
+
+                return ret.GetInstanceProcAddr(ret.CurrentInstance.GetValueOrDefault(), x);
+            });
+
+            return ret;
+        }
+    }
+}