Add missing program shutdown

ArchiSteamFarm/Bot.cs

@@ -449,6 +449,8 @@ namespace ArchiSteamFarm {
 			if (SteamClient.IsConnected) {
 				Disconnect();
 			}
+
+			Events.OnBotShutdown();
 		}
 
 		internal async Task LootIfNeeded() {

ArchiSteamFarm/Events.cs

@@ -1,8 +1,18 @@
-using SteamKit2;
+using System.Linq;
+using SteamKit2;
 
 namespace ArchiSteamFarm {
 	internal static class Events {
 		internal static void OnStateUpdated(Bot bot, SteamFriends.PersonaStateCallback callback) {
 		}
+
+		internal static void OnBotShutdown() {
+			if (Bot.Bots.Values.Any(bot => bot.KeepRunning)) {
+				return;
+			}
+
+			Logging.LogGenericInfo("No bots are running, exiting");
+			Program.Exit();
+		}
 	}
 }