refactor: adopt UIScene lifecycle

feat: add initial support for pip

feat: add setting toggle for pip

fix: let os handle invokation of pip which is more reliable

fix: UIScene compatibility with airplay

fix: black screen on external display when on app view and streaming

fix: incorrect window size when launched directly on external display

fix: wrong resolution shown in settings when in stream session

Enable gamemode flag for iOS18+

Explicitly enters pip mode when in background

VoidLink/Stream/StreamManager.m

@@ -29,6 +29,7 @@
     UIView* _renderView;
     id<ConnectionCallbacks> _callbacks;
     Connection* _connection;
+    VideoDecoderRenderer* _videoRenderer;
 }
 
 - (id) initWithConfig:(StreamConfiguration*)config renderView:(UIView*)view connectionCallbacks:(id<ConnectionCallbacks>)callbacks {
@@ -103,8 +104,12 @@
     
     // Initializing the renderer must be done on the main thread
     dispatch_async(dispatch_get_main_queue(), ^{
-        VideoDecoderRenderer* renderer = [[VideoDecoderRenderer alloc] initWithView:self->_renderView callbacks:self->_callbacks streamAspectRatio:(float)self->_config.width / (float)self->_config.height useFramePacing:self->_config.useFramePacing];
-        self->_connection = [[Connection alloc] initWithConfig:self->_config renderer:renderer connectionCallbacks:self->_callbacks];
+        self->_videoRenderer = [[VideoDecoderRenderer alloc] initWithView:self->_renderView
+                                                               callbacks:self->_callbacks
+                                                       streamAspectRatio:(float)self->_config.width / (float)self->_config.height
+                                                          useFramePacing:self->_config.useFramePacing];
+
+        self->_connection = [[Connection alloc] initWithConfig:self->_config renderer:self->_videoRenderer connectionCallbacks:self->_callbacks];
         NSOperationQueue* opQueue = [[NSOperationQueue alloc] init];
         [opQueue addOperation:self->_connection];
     });