Modify macOS implementation

Add style flags to window.

src/main.m

@@ -26,7 +26,7 @@ int main() {
                 .width = WINDOW_WIDTH,
                 .height = WINDOW_HEIGHT
             },
-            .style_flags = CBR_WINDOW_STYLE_FLAG_TITLED,
+            .style_flags = CBR_WINDOW_STYLE_FLAG_TITLED | CBR_WINDOW_STYLE_FLAG_CLOSABLE | CBR_WINDOW_STYLE_FLAG_RESIZABLE | CBR_WINDOW_STYLE_FLAG_MINIATURIZABLE | CBR_WINDOW_STYLE_FLAG_FULL_SCREEN,
             .title = [applicationName cStringUsingEncoding:NSUTF8StringEncoding]
         });
 		[NSApp activateIgnoringOtherApps:YES];