添加处理音频窗口大小的功能，支持动态调整插件宿主窗口尺寸

src/backend/src/vst2_host/src/vst2host.cpp

@@ -42,6 +42,14 @@ inline VstIntPtr VSTCALLBACK host_callback(AEffect*  effect,
 		case audioMasterGetInputLatency:
 		case audioMasterGetOutputLatency:
 			return 0;
+		case audioMasterSizeWindow: {
+			const auto width = static_cast<int32_t>(index);
+			const auto height = static_cast<int32_t>(value);
+			if (window_handle) {
+				glfwSetWindowSize(window_handle, width, height);
+			}
+			return 1;
+		}
 
 		/* -------- 显示刷新 -------- */
 		case audioMasterUpdateDisplay: