Initial sacred_re scaffold with borderless fullscreen mod

- Launcher (sacred_re.exe) starts sacred.exe with sacred_re.dll injected
  via Detours; the DLL verifies the Sacred Gold 2.28 build before hooking.
- Hook framework: RE_HOOK for game addresses, RE_HOOK_API for Windows
  APIs, per-hook enable/disable in sacred_re.ini, sacred_re.log.
- Game code: Log (0x66f1c0) hooked, CmdLineHasFlag (0x813140) rewritten.
- Borderless mod: forces windowed mode, covers the monitor, scales the
  1024x768 image aspect-correct, remaps mouse input, keeps running in the
  background with keyboard input hidden while unfocused.
- CMake/Ninja/MSVC x86 build, VS Code setup, disasm tool, function map.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

CMakeLists.txt

@@ -0,0 +1,43 @@
+cmake_minimum_required(VERSION 3.24)
+project(sacred_re LANGUAGES C CXX)
+
+# sacred.exe is a 32-bit process; everything we inject into it must be 32-bit too.
+if(NOT CMAKE_SIZEOF_VOID_P EQUAL 4)
+    message(FATAL_ERROR "sacred_re must be built for 32-bit x86 (use the 'x86-*' presets / an x86 MSVC environment).")
+endif()
+if(NOT MSVC)
+    message(FATAL_ERROR "sacred_re requires MSVC (the game's C++ ABI is MSVC's).")
+endif()
+
+set(CMAKE_CXX_STANDARD 20)
+set(CMAKE_CXX_STANDARD_REQUIRED ON)
+# Static CRT: no VC++ redistributable needed next to the game.
+set(CMAKE_MSVC_RUNTIME_LIBRARY "MultiThreaded$<$<CONFIG:Debug>:Debug>")
+
+add_compile_definitions(WIN32_LEAN_AND_MEAN NOMINMAX _CRT_SECURE_NO_WARNINGS)
+
+include(cmake/Detours.cmake)
+
+set(SACRED_RE_CXX_FLAGS /W4 /permissive- /utf-8)
+
+# --- sacred_re.dll: injected into sacred.exe, installs the hooks -------------
+add_library(sacred_re SHARED
+    src/re/dllmain.cpp
+    src/re/hook.cpp
+    src/re/log.cpp
+    src/re/config.cpp
+    src/re/sacred_re.def
+    src/game/engine/log.cpp
+    src/game/engine/cmdline.cpp
+    src/mods/borderless.cpp
+)
+target_include_directories(sacred_re PRIVATE src)
+target_compile_options(sacred_re PRIVATE ${SACRED_RE_CXX_FLAGS})
+target_link_libraries(sacred_re PRIVATE detours)
+
+# --- sacred_re.exe: launches sacred.exe with sacred_re.dll injected ----------
+add_executable(sacred_re_launcher WIN32 src/launcher/main.cpp)
+set_target_properties(sacred_re_launcher PROPERTIES OUTPUT_NAME sacred_re)
+target_compile_options(sacred_re_launcher PRIVATE ${SACRED_RE_CXX_FLAGS})
+target_link_libraries(sacred_re_launcher PRIVATE detours)
+add_dependencies(sacred_re_launcher sacred_re)