input: Write a python function to setup and manage an MQTT RPC server that handles JSON-RPC requests and responses. 
  assert isinstance(TMQTTRPCServer(client, 'Driver'), TMQTTRPCServer)
  assert callable(dispatcher[("test", "echo")])
  assert dispatcher[("test", "add")](2, 3) == 5
output: def TMQTTRPCServer(client, name):
      import paho.mqtt.client as mqtt
      import json
  
      class Server:
          def __init__(self, client, name):
              self.client = client
              self.name = name
              self.dispatcher = {}
  
              self.client.on_message = self.on_message
              self.client.on_connect = self.on_connect
  
              self.client.connect("localhost", 1883, 60)
              self.client.loop_start()
  
          def on_connect(self, client, userdata, flags, rc):
              client.subscribe(f"{self.name}/#")
  
          def on_message(self, client, userdata, msg):
              try:
                  request = json.loads(msg.payload)
                  method = request.get("method")
                  params = request.get("params", [])
                  id = request.get("id")
                  if method and (method in self.dispatcher):
                      response = {
                          "jsonrpc": "2.0",
                          "result": self.dispatcher[method](*params),
                          "id": id
                      }
                  else:
                      response = {
                          "jsonrpc": "2.0",
                          "error": {"code": -32601, "message": "Method not found"},
                          "id": id
                      }
                  self.client.publish(f"{self.name}/response", json.dumps(response))
              except Exception as e:
                  error_response = {
                      "jsonrpc": "2.0",
                      "error": {"code": -32603, "message": "Internal error", "data": str(e)},
                      "id": None
                  }
                  self.client.publish(f"{self.name}/response", json.dumps(error_response))
  
          def register_method(self, method_name, func):
              self.dispatcher[method_name] = func
  
      server = Server(client, name)
  
      def echo(msg):
          return msg
  
      def add(x, y):
          return x + y
  
      dispatcher = server.dispatcher
      server.register_method(("test", "echo"), echo)
      server.register_method(("test", "add"), add)
  
      return server