fix: include windows.h for Windows build compatibility

The getExeDir() function uses MAX_PATH and GetModuleFileNameW which
require windows.h, but the header was missing.

Author: Majitelll

src/renderer_vulkan.cpp

@@ -13,6 +13,10 @@
 #include <set>
 #include <stdexcept>
 
+#ifdef _WIN32
+#include <windows.h>
+#endif
+
 // ─────────────────────────────────────────────────────────────────────────────
 // Config
 // ─────────────────────────────────────────────────────────────────────────────