Provide APIGatewayLambdaJSONEvent for unmarshalling from default resources/gateway/inputmapping_json.vtl transform
Provide APIGatewayLambdaJSONEvent for unmarshalling from default resources/gateway/inputmapping_json.vtl transform

Usage:

```
func sampleLambda(event *json.RawMessage, context *sparta.LambdaContext, w *http.ResponseWriter, logger *logrus.Logger) {
	var lambdaEvent sparta.APIGatewayLambdaJSONEvent
	err := json.Unmarshal([]byte(*event), &lambdaEvent)
	if err != nil {
		logger.Error("Failed to unmarshal event data: ", err.Error())
		http.Error(*w, err.Error(), http.StatusInternalServerError)
		return
	}
	...
```

mweagle/Sparta,mweagle/Sparta,mweagle/Sparta,mweagle/Sparta