docs: add plugin setup guide

plugin/lib/commonlibf4/include/RE/H/hkMemoryRouter.h

@@ -0,0 +1,48 @@
+#pragma once
+
+#include "RE/H/hkLifoAllocator.h"
+
+namespace RE
+{
+	class hkMemoryAllocator;
+
+	class hkMemoryRouter
+	{
+	public:
+		using Allocator = hkMemoryAllocator;
+		using Stack = hkLifoAllocator;
+
+		[[nodiscard]] static hkMemoryRouter& GetInstance()
+		{
+			return *GetInstancePtr();
+		}
+
+		[[nodiscard]] static hkMemoryRouter* GetInstancePtr()
+		{
+			static REL::Relocation<std::uint32_t*> slotID{ ID::hkMemoryRouter::tlsSlotID };
+			return static_cast<hkMemoryRouter*>(REX::W32::TlsGetValue(*slotID));
+		}
+
+		static void ReplaceInstance(hkMemoryRouter* a_router)
+		{
+			static REL::Relocation<std::uint32_t*> slotID{ ID::hkMemoryRouter::tlsSlotID };
+			REX::W32::TlsSetValue(*slotID, a_router);
+		}
+
+		void                 SetDebug(Allocator* a_val) noexcept { debug = a_val; }
+		void                 SetHeap(Allocator* a_val) noexcept { heap = a_val; }
+		void                 SetSolver(Allocator* a_val) noexcept { solver = a_val; }
+		void                 SetTemp(Allocator* a_val) noexcept { temp = a_val; }
+		[[nodiscard]] Stack& GetStack() noexcept { return stack; }
+
+		// members
+		Stack              stack;                  // 0x00
+		hkMemoryAllocator* temp{ nullptr };        // 0x50
+		hkMemoryAllocator* heap{ nullptr };        // 0x58
+		hkMemoryAllocator* debug{ nullptr };       // 0x60
+		hkMemoryAllocator* solver{ nullptr };      // 0x68
+		void*              userData{ nullptr };    // 0x70
+		std::uint32_t      refObjLocalStore{ 0 };  // 0x78
+	};
+	static_assert(sizeof(hkMemoryRouter) == 0x80);
+}