Implement Warden module execution foundation (Phase 1 & 2)

Added architecture for loading and executing native x86 Warden modules:

New classes:
- WardenModule: Individual module loader with 8-step pipeline
  ✅ MD5 verification (working)
  ✅ RC4 decryption (working)
  ⏳ RSA/zlib/exe-parsing/relocation/API-binding/execution (TODOs)
- WardenModuleManager: Module lifecycle and disk caching
  ~/.local/share/wowee/warden_cache/<MD5>.wdn
- WardenFuncList: Callback structure for module execution

Integration:
- Added wardenModuleManager_ to GameHandler
- Module manager initialized on startup
- Foundation ready for phases 3-7 (validation → execution)

Documentation:
- WARDEN_MODULE_ARCHITECTURE.md (comprehensive 7-phase roadmap)
- Estimated 2-3 months for full native code execution
- Alternative: packet capture approach (1-2 weeks)

Status: Crypto layer complete, execution layer TODO

CMakeLists.txt

@@ -90,6 +90,7 @@ set(WOWEE_SOURCES
     # Game
     src/game/game_handler.cpp
     src/game/warden_crypto.cpp
+    src/game/warden_module.cpp
     src/game/transport_manager.cpp
     src/game/world.cpp
     src/game/player.cpp