feat: enable Windows dark mode for GLFW window

- Add DwmSetWindowAttribute call for immersive dark mode
- Include glfw3native.h after glfw3.h on Windows

cbt/opengl/context.cpp

@@ -1,7 +1,18 @@
 #include <string_view>
 
+#ifdef _WIN32
+#include <dwmapi.h>
+#include <windows.h>
+#endif
+
 #define GLFW_INCLUDE_NONE
 #include "GLFW/glfw3.h"
+
+#ifdef _WIN32
+#define GLFW_EXPOSE_NATIVE_WIN32
+#include "GLFW/glfw3native.h"
+#endif
+
 #include "fmt/std.h"
 #include "glad/glad.h"
 
@@ -58,6 +69,12 @@ context::context(std::string title, int width, int height) {
 
     glfwMakeContextCurrent(m_window);
 
+#ifdef _WIN32
+    auto hwnd = glfwGetWin32Window(static_cast<GLFWwindow*>(m_window));
+    BOOL use_dark_mode = TRUE;
+    DwmSetWindowAttribute(hwnd, DWMWA_USE_IMMERSIVE_DARK_MODE, &use_dark_mode, sizeof(use_dark_mode));
+#endif
+
     if (!setup_gl()) {
         terminate();
         return;