Add documentation to AWS MQ engine type validation rules (#974)

* Initial plan

* Add documentation comments to MQ engine type enum lists

Co-authored-by: wata727 <[email protected]>

---------

Co-authored-by: copilot-swe-agent[bot] <[email protected]>
Co-authored-by: wata727 <[email protected]>

Author: Copilot

rules/aws_mq_broker_invalid_engine_type.go

@@ -19,6 +19,8 @@ func NewAwsMqBrokerInvalidEngineTypeRule() *AwsMqBrokerInvalidEngineTypeRule {
 	return &AwsMqBrokerInvalidEngineTypeRule{
 		resourceType:  "aws_mq_broker",
 		attributeName: "engine_type",
+		// https://docs.aws.amazon.com/amazon-mq/latest/api-reference/broker-engine-types.html
+		// Terraform uses mixed case: ActiveMQ, RabbitMQ (AWS API uses uppercase: ACTIVEMQ, RABBITMQ)
 		enum: []string{
 			"ActiveMQ",
 			"RabbitMQ",

rules/aws_mq_configuration_invalid_engine_type.go

@@ -19,6 +19,8 @@ func NewAwsMqConfigurationInvalidEngineTypeRule() *AwsMqConfigurationInvalidEngi
 	return &AwsMqConfigurationInvalidEngineTypeRule{
 		resourceType:  "aws_mq_configuration",
 		attributeName: "engine_type",
+		// https://docs.aws.amazon.com/amazon-mq/latest/api-reference/broker-engine-types.html
+		// Terraform uses mixed case: ActiveMQ, RabbitMQ (AWS API uses uppercase: ACTIVEMQ, RABBITMQ)
 		enum: []string{
 			"ActiveMQ",
 			"RabbitMQ",