Initial commit: bt411 -- standalone Windows BattleTech (Tesla 4.10 port)

Clean, self-contained extraction of the BattleTech-specific work from the
reverse-engineering workspace -- engine + game + content + build, with nothing
from Red Planet or the raw archive dumps. Builds green (Win32) and runs the
single-player drive->animate->target->fire->damage->destroy loop out of the box.

Layout:
  engine/   MUNGA + MUNGA_L4 shared 2007 engine, carrying our BT render/loader
            work (bgfload/L4D3D/L4VIDEO: BSL bit-slice decode, LOD/ground/shadow
            models) + image codec; the minimal rp/ headers the audio HAL needs
  game/     reconstructed BT logic + surviving-original BT source + fwd shims
            + WinMain launcher
  content/  full runtime tree (BTL4.RES, VIDEO/, GAUGE/, AUDIO/, eggs, BTDPL.INI)
  docs/     format specs + reconstruction ledgers
  reference/ raw Ghidra pseudocode (recon source-of-truth) + decomp exporter
  tools/    MP console emulator + map/resource scanners

One top-level CMake builds munga_engine lib + bt410_l4 game lib + btl4.exe.
All paths relativized (186 fwd shims + ~437 CMake abs paths -> repo-relative);
DXSDK is the one external, overridable via -DDXSDK. Verified: builds to a
byte-identical 2.27MB exe and runs combat (TARGET DESTROYED, 0 crashes) against
the bundled content.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

game/reconstructed/gnrator.cpp

@@ -0,0 +1,52 @@
+//===========================================================================//
+// File:	gnrator.cpp                                                         //
+// Project: BattleTech           Brick: Entity Manager                        //
+// Contents: Generator subsystem -- ALIAS / RECONCILIATION NOTE               //
+//---------------------------------------------------------------------------//
+// Copyright (C) 1995, Virtual World Entertainment, Inc. All Rights reserved //
+//                      PROPRIETARY AND CONFIDENTIAL                         //
+//===========================================================================//
+//
+// THIS IS NOT A SECOND GENERATOR CLASS.
+// ------------------------------------------------------------------------
+// gnrator.cpp's Generator == powersub.cpp's Generator (HeatSink-derived
+// voltage generator, classID 0xBC1, vtable 0x50fd74, ctor @0x4b225c, dtor
+// @0x4b237c, GeneratorSimulation @0x4b1f7c, HandleMessage @0x4b21d0,
+// CreateStreamedSubsystem @0x4b23bc).  The full reconstruction is in
+// powersub.cpp.  See gnrator.hpp for the reconciliation evidence.
+//
+// The surviving fragment GNRATOR.TCP carries two method bodies.  TestClass
+// matches powersub.cpp exactly.  ResetToInitialState() is the ONE method the
+// powersub.cpp reconstruction did NOT recover -- it is reproduced verbatim
+// below (from the surviving source) so the next reconciler can fold it into
+// powersub.cpp's Generator.  In the shipped binary this is the Generator
+// vtable's slot-10 (ResetToInitialState), distinct from the Generator
+// HandleMessage / GeneratorSimulation already in powersub.cpp.
+//
+//   // --- verbatim from GNRATOR.TCP -------------------------------------
+//   Logical Generator::TestClass(Mech &)        // == powersub.cpp (line 844)
+//   {
+//       return True;
+//   }
+//
+//   void Generator::ResetToInitialState()       // ADDITION to powersub.cpp
+//   {
+//       HeatableSubsystem::ResetToInitialState();
+//       outputVoltage = 0.0f;
+//   }
+//   // -------------------------------------------------------------------
+//
+// Note the surviving ResetToInitialState chains HeatableSubsystem (not the
+// HeatSink intermediate) -- consistent with the inlined base chain seen in the
+// other HeatSink-family resets.  No code is emitted from this translation unit;
+// it exists only to record the file mapping and the recovered method.
+//
+
+#include <bt.hpp>
+#pragma hdrstop
+
+#if !defined(GNRATOR_HPP)
+#	include <gnrator.hpp>
+#endif
+
+// Intentionally empty -- Generator is defined in powersub.cpp.