Implemented guest-to-host function pointers (#7)

* Implemented guest-to-host function pointers (WIP)

Co-Authored-By: Skyth (Asilkan) <19259897+blueskythlikesclouds@users.noreply.github.com>

* function: support more types for function pointers

* api: ported BlueBlur headers and misc. research

* Move over function-pointers changes from options-menu branch.

---------

Co-authored-by: Skyth (Asilkan) <19259897+blueskythlikesclouds@users.noreply.github.com>

UnleashedRecomp/api/SWA/CSD/GameObjectCSD.h

@@ -0,0 +1,20 @@
+#pragma once
+
+#include "SWA.inl"
+#include "CSD/Manager/csdmRCPtr.h"
+#include "SWA/System/GameObject.h"
+
+namespace Chao::CSD
+{
+    class CProject;
+}
+
+namespace SWA
+{
+    class CGameObjectCSD : public CGameObject
+    {
+    public:
+        xpointer<void> m_pVftable;
+        Chao::CSD::RCPtr<Chao::CSD::CProject> m_rcProject;
+    };
+}