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>

cmake/Detours.cmake

@@ -0,0 +1,26 @@
+# Microsoft Detours (MIT) — function hooking and DLL injection.
+# Upstream ships no CMake build, so we compile its sources into a static lib.
+include(FetchContent)
+FetchContent_Declare(detours_src
+    GIT_REPOSITORY https://github.com/microsoft/Detours.git
+    GIT_TAG        v4.0.1
+    GIT_SHALLOW    TRUE
+)
+FetchContent_MakeAvailable(detours_src)
+
+set(_d ${detours_src_SOURCE_DIR}/src)
+add_library(detours STATIC
+    ${_d}/detours.cpp
+    ${_d}/modules.cpp
+    ${_d}/disasm.cpp
+    ${_d}/image.cpp
+    ${_d}/creatwth.cpp
+    ${_d}/disolx86.cpp
+    ${_d}/disolx64.cpp
+    ${_d}/disolia64.cpp
+    ${_d}/disolarm.cpp
+    ${_d}/disolarm64.cpp
+)
+target_include_directories(detours PUBLIC ${_d})
+# C++20 implies /permissive-, which v4.0.1 does not compile under (goto over initialisations).
+target_compile_options(detours PRIVATE /W3 /permissive)