Add config option for forced detour provider

BepInEx.IL2CPP/Hook/NativeDetourHelper.cs

@@ -1,3 +1,4 @@
+using BepInEx.Configuration;
 using BepInEx.IL2CPP.Hook.Dobby;
 using BepInEx.IL2CPP.Hook.Funchook;
 using System;
@@ -7,11 +8,34 @@ namespace BepInEx.IL2CPP.Hook;
 
 public class NativeDetourHelper
 {
+    internal enum DetourProvider
+    {
+        Default,
+        Dobby,
+        Funchook
+    }
+    private static readonly ConfigEntry<DetourProvider> DetourProviderType = ConfigFile.CoreConfig.Bind(
+        "Detours", "DetourProviderType",
+        DetourProvider.Default,
+        "The native provider to use for managed detours"
+    );
+
     public static bool DEBUG_DETOURS = false;
+
+    private static INativeDetour CreateDefault(nint original, nint target)
+    {
+        // TODO: check and provide an OS accurate provider
+        return new DobbyDetour(original, target);
+    }
+
     public static INativeDetour Create(nint original, nint target)
     {
-        return new DobbyDetour(original, target);
-        //return new FunchookDetour(original, target);
+        return DetourProviderType.Value switch
+        {
+            DetourProvider.Dobby => new DobbyDetour(original, target),
+            DetourProvider.Funchook => new FunchookDetour(original, target),
+            _ => CreateDefault(original, target)
+        };
     }
 
     public static INativeDetour CreateAndApply<T>(nint from, T to, out T original, CallingConvention? callingConvention = null)