Crash reports and a guard for burning bone particles without a device

- re/crash: unhandled exceptions write sacred_re_crash.txt (module+offset,
  registers, return addresses on the stack) and a minidump; the game's own
  filter is chained behind ours
- guards: cParticleSystem_burningBone::Render (0x774e10) skips drawing when
  given a null device (crash at sacred.exe+0x374e39 after Esc while walking)

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

CMakeLists.txt

@@ -28,6 +28,7 @@ add_library(sacred_re SHARED
     src/re/log.cpp
     src/re/config.cpp
     src/re/patch.cpp
+    src/re/crash.cpp
     src/re/sacred_re.def
     src/game/engine/log.cpp
     src/game/engine/cmdline.cpp
@@ -54,10 +55,11 @@ add_library(sacred_re SHARED
     src/mods/recordcache.cpp
     src/mods/megamap.cpp
     src/mods/respec.cpp
+    src/mods/guards.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 nlohmann_json::nlohmann_json)
+target_link_libraries(sacred_re PRIVATE detours nlohmann_json::nlohmann_json dbghelp)
 
 # --- sacred_re.exe: launches sacred.exe with sacred_re.dll injected ----------
 add_executable(sacred_re_launcher WIN32 src/launcher/main.cpp)