Only allow console to shut down Geyser with a command

bootstrap/standalone/src/main/java/org/geysermc/platform/standalone/console/GeyserLogger.java

@@ -108,4 +108,9 @@ public class GeyserLogger extends SimpleTerminalConsole implements IGeyserLogger
     public void sendMessage(String message) {
         info(message);
     }
+
+    @Override
+    public boolean isConsole() {
+        return true;
+    }
 }

connector/src/main/java/org/geysermc/connector/command/CommandSender.java

@@ -11,4 +11,6 @@ public interface CommandSender {
     }
 
     void sendMessage(String message);
+
+    boolean isConsole();
 }

connector/src/main/java/org/geysermc/connector/command/defaults/StopCommand.java

@@ -44,6 +44,9 @@ public class StopCommand extends GeyserCommand {
 
     @Override
     public void execute(CommandSender sender, String[] args) {
+        if (!sender.isConsole())
+            return;
+
         connector.shutdown();
     }
 }

connector/src/main/java/org/geysermc/connector/network/session/GeyserSession.java

@@ -324,6 +324,11 @@ public class GeyserSession implements CommandSender {
         upstream.sendPacket(textPacket);
     }
 
+    @Override
+    public boolean isConsole() {
+        return false;
+    }
+
     public void sendForm(FormWindow window, int id) {
         windowCache.showWindow(window, id);
     }