feat(cli): add sub command kamel kamelet for get and delete #2312

[tadayosi]

This adds a feature-rich kamel kamelet sub command with get and delete supports.

$ ./kamel kamelet get -h
Get defined Kamelet.

Usage:
  kamel kamelet get [flags]

Flags:
      --action         Show only action Kamelets
      --bundled        Includes bundled Kamelets (default true)
      --group string   Filters Kamelets by group
  -h, --help           help for get
      --read-only      Includes read-only Kamelets (default true)
      --sink           Show only sink Kamelets
      --source         Show only source Kamelets
...

$ ./kamel kamelet delete -h
Delete a Kamelet.

Usage:
  kamel kamelet delete <name> [flags]

Flags:
      --all    Delete all Kamelets
  -h, --help   help for delete
...

kamel kamelet get output would look like this:

$ ./kamel kamelet get
NAME				PHASE	TYPE	GROUP			BUNDLED	READ ONLY	TITLE
aws-ddb-streams-source		Ready	source	AWS DynamoDB Streams	true	true		AWS DynamoDB Streams Source
aws-kinesis-firehose-sink	Ready	sink	AWS Kinesis Firehose	true	true		AWS Kinesis Firehose Sink
aws-kinesis-sink		Ready	sink	AWS Kinesis		true	true		AWS Kinesis Sink
aws-kinesis-source		Ready	source	AWS Kinesis		true	true		AWS Kinesis Source
aws-lambda-sink			Ready	sink	AWS Lambda		true	true		AWS Lambda Sink
aws-s3-sink			Ready	sink	AWS S3			true	true		AWS S3 Sink
aws-s3-source			Ready	source	AWS S3			true	true		AWS S3 Source
aws-sns-fifo-sink		Ready	sink	AWS SNS			true	true		AWS SNS FIFO Sink
aws-sns-sink			Ready	sink	AWS SNS			true	true		AWS SNS Sink
aws-sqs-batch-sink		Ready	sink	AWS SQS			true	true		AWS SQS Batch Sink
aws-sqs-fifo-sink		Ready	sink	AWS SQS			true	true		AWS SQS FIFO Sink
aws-sqs-sink			Ready	sink	AWS SQS			true	true		AWS SQS Sink
aws-sqs-source			Ready	source	AWS SQS			true	true		AWS SQS Source
...