Add !version

ArchiSteamFarm/Bot.cs

@@ -375,6 +375,8 @@ namespace ArchiSteamFarm {
 						return ResponseStop(steamID);
 					case "!update":
 						return await ResponseUpdate(steamID).ConfigureAwait(false);
+					case "!version":
+						return ResponseVersion(steamID);
 					default:
 						return ResponseUnknown(steamID);
 				}
@@ -1305,6 +1307,19 @@ namespace ArchiSteamFarm {
 			return "Done!";
 		}
 
+		private string ResponseVersion(ulong steamID) {
+			if (steamID == 0) {
+				Logging.LogNullError(nameof(steamID));
+				return null;
+			}
+
+			if (!IsMaster(steamID)) {
+				return null;
+			}
+
+			return "ASF V" + Program.Version;
+		}
+
 		private void HandleCallbacks() {
 			TimeSpan timeSpan = TimeSpan.FromMilliseconds(CallbackSleep);
 			while (KeepRunning || SteamClient.IsConnected) {

ArchiSteamFarm/Program.cs

@@ -433,7 +433,7 @@ namespace ArchiSteamFarm {
 			AppDomain.CurrentDomain.UnhandledException += UnhandledExceptionHandler;
 			TaskScheduler.UnobservedTaskException += UnobservedTaskExceptionHandler;
 
-			Logging.LogGenericInfo("Archi's Steam Farm, version " + Version);
+			Logging.LogGenericInfo("ASF V" + Version);
 			Directory.SetCurrentDirectory(ExecutableDirectory);
 			InitServices();