feat(windows): empty main window

src/c/main_window.c

@@ -0,0 +1,25 @@
+#include "main_window.h"
+
+static Window *s_main_window;
+
+static void main_window_load(Window *window) {
+
+}
+
+static void main_window_unload(Window *window) {
+
+}
+
+void main_window_init(void) {
+  s_main_window = window_create();
+  window_set_window_handlers(s_main_window, (WindowHandlers) {
+    .load = main_window_load,
+    .unload = main_window_unload
+  });
+  window_stack_push(s_main_window, true);
+}
+
+void main_window_deinit(void) {
+  window_stack_remove(s_main_window, true);
+  window_destroy(s_main_window);
+}