Initial commit: LegacyForge mod loader for Minecraft Legacy Edition

SKSE-style external mod loader with zero game source modifications.
- LegacyForge.Launcher: C# console app that injects runtime DLL into game process
- LegacyForgeRuntime: C++ DLL with PDB symbol resolution, MinHook function hooking, and .NET CoreCLR hosting
- LegacyForge.Core: C# mod discovery and lifecycle management
- LegacyForge.API: Fabric-style mod API with namespaced string IDs, fluent property builders, and event system
- ExampleMod: Sample mod demonstrating block/item registration

LegacyForgeRuntime/src/GameHooks.cpp

@@ -0,0 +1,48 @@
+#include "GameHooks.h"
+#include "DotNetHost.h"
+#include <cstdio>
+
+namespace GameHooks
+{
+    RunStaticCtors_fn Original_RunStaticCtors = nullptr;
+    MinecraftTick_fn Original_MinecraftTick = nullptr;
+    MinecraftInit_fn Original_MinecraftInit = nullptr;
+    MinecraftDestroy_fn Original_MinecraftDestroy = nullptr;
+
+    void Hooked_RunStaticCtors()
+    {
+        printf("[LegacyForge] RunStaticCtors hook fired -- calling PreInit\n");
+        DotNetHost::CallPreInit();
+
+        Original_RunStaticCtors();
+
+        printf("[LegacyForge] RunStaticCtors complete -- calling Init\n");
+        DotNetHost::CallInit();
+    }
+
+    void __fastcall Hooked_MinecraftTick(void* thisPtr, bool bFirst, bool bUpdateTextures)
+    {
+        Original_MinecraftTick(thisPtr, bFirst, bUpdateTextures);
+
+        if (bFirst)
+        {
+            DotNetHost::CallTick();
+        }
+    }
+
+    void __fastcall Hooked_MinecraftInit(void* thisPtr)
+    {
+        Original_MinecraftInit(thisPtr);
+
+        printf("[LegacyForge] Minecraft::init complete -- calling PostInit\n");
+        DotNetHost::CallPostInit();
+    }
+
+    void __fastcall Hooked_MinecraftDestroy(void* thisPtr)
+    {
+        printf("[LegacyForge] Minecraft::destroy -- calling Shutdown\n");
+        DotNetHost::CallShutdown();
+
+        Original_MinecraftDestroy(thisPtr);
+    }
+}