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>

src/re/dllmain.cpp

@@ -8,6 +8,7 @@
 #include <detours.h>
 
 #include "re/config.h"
+#include "re/crash.h"
 #include "re/hook.h"
 #include "re/log.h"
 #include "re/patch.h"
@@ -42,6 +43,7 @@ void Startup(HMODULE module) {
     re::OpenLog((dir + L"sacred_re.log").c_str());
     re::SetConfigPath(dir + L"sacred_re.ini");
     re::Log("sacred_re loaded");
+    re::InstallCrashHandler(dir);
 
     if (!IsSupportedGameBuild()) {
         re::Log("unsupported sacred.exe build, no hooks installed");