Added StopCommand

src/main/java/org/openautonomousconnection/webserver/commands/StopCommand.java

@@ -0,0 +1,21 @@
+package org.openautonomousconnection.webserver.commands;
+
+import dev.unlegitdqrk.unlegitlibrary.command.Command;
+import dev.unlegitdqrk.unlegitlibrary.command.CommandExecutor;
+import org.openautonomousconnection.webserver.Main;
+
+import javax.management.InstanceAlreadyExistsException;
+import java.util.ArrayList;
+import java.util.Collections;
+
+public class StopCommand extends Command {
+
+    public StopCommand() throws InstanceAlreadyExistsException {
+        super(Main.getCommandManager(), "stop", "Stop the Server", "stop", Collections.singletonList(Main.PERMISSION_ALL), new ArrayList<>());
+    }
+
+    @Override
+    public void execute(CommandExecutor commandExecutor, String s, String[] strings) {
+        System.exit(0);
+    }
+}