feat: pip for metal renderer

VoidLink/Stream/StreamManager.m

@@ -106,7 +106,7 @@
     // Initializing the renderer must be done on the main thread
     dispatch_async(dispatch_get_main_queue(), ^{
         self->_videoRenderer = [[VideoDecoderRenderer alloc] initWithView:self->_renderView callbacks:self->_callbacks streamAspectRatio:(float)self->_config.width / (float)self->_config.height];
-
+        self->_videoRenderer.pipLayer = self.pipLayer;
         self->_connection = [[Connection alloc] initWithConfig:self->_config renderer:self->_videoRenderer connectionCallbacks:self->_callbacks];
         NSOperationQueue* opQueue = [[NSOperationQueue alloc] init];
         [opQueue addOperation:self->_connection];