### Is there an existing issue for this?

- [X] I have searched the existing issues

### Feature description

SNS allows for the publishing of messages to an SMS destination with a phone number. Those messages are logged and stored in the `SnsStore`, but there is no way to retrieve them for verification. The request here is to expose a new endpoint which returns SMS messages from the store, similar to the one made available to retrieve email messages sent via SES.

### 🧑‍💻 Implementation

The `SNSServicePlatformEndpointMessagesApiResource` class makes endpoints available for accessing platform endpoint messages sent via SNS. A similar resource class could be implemented to provide new endpoints for accessing SMS messages.

Given that interaction platform endpoint messages is exposed at the path `/_aws/sns/platform-endpoint-messages`, SMS message interaction would presumably be exposed at `/_aws/sns/sms-messages`. A `GET` endpoint could accept an optional `phoneNumber` query parameter to filter messages based on the destination phone number.

```python
class SNSServiceSMSMessagesApiResource:
  @route(sns_constants.SMS_MSGS_ENDPOINT, methods=["GET"])
    def on_get(self, request: Request):
      account_id = #...
      region = #...
      filter_phone_number = request.args.get("phoneNumber")
      # get store; conditionally filter messages based on filter_phone_number
```

### Anything else?

_No response_
if value >= operand:
                    return False
            elif operator == ">=":
                if value < operand:
                    return False
            elif operator == "<=":
                if value > operand:
                    return False
        return True
class PublishDispatcher:
    """
    The PublishDispatcher is responsible for dispatching the publishing of SNS messages asynchronously to worker
    threads via a `ThreadPoolExecutor`, depending on the SNS subscriber protocol and filter policy.
    """
    topic_notifiers = {
        "http": HttpTopicPublisher(),
        "https": HttpTopicPublisher(),
        "email": EmailTopicPublisher(),
        "email-json": EmailJsonTopicPublisher(),
        "sms": SmsTopicPublisher(),
        "sqs": SqsTopicPublisher(),
        "application": ApplicationTopicPublisher(),
        "lambda": LambdaTopicPublisher(),
        "firehose": FirehoseTopicPublisher(),
    }
    batch_topic_notifiers = {"sqs": SqsBatchTopicPublisher()}
    sms_notifier = SmsPhoneNumberPublisher()
    application_notifier = ApplicationEndpointPublisher()
    subscription_filter = SubscriptionFilter()
    def __init__(self, num_thread: int = 10):