Separating runtime from application code to improve building. Upgraded mooncore packages. Started switching to flyonui. Added PluginFramework plugin loading via mooncore

Moonlight.Client.Runtime/Program.cs

@@ -0,0 +1,9 @@
+using Moonlight.Client;
+using Moonlight.Client.Runtime;
+
+var startup = new Startup();
+
+var pluginLoader = new PluginLoader();
+pluginLoader.Initialize();
+
+await startup.Run(args, pluginLoader.Instances);