Add cli for AWS EC2 instance (using Cloud Formation)

[vdesabou]

https://kafka-docker-playground.io/#/how-to-use?id=%f0%9f%8e%a9-aws-ec2-alfred-workflow

[vdesabou]

playground ec2 create --suffix test
09:38:57 ℹ️ 🏭 creating t3.2xlarge instance kafka-docker-playground-vsaboulin-test in eu-west-3 region (1000 Gb)
09:38:57 ℹ️ 🌀 cloud formation file used: /Users/vsaboulin/Documents/github/kafka-docker-playground/cloudformation/kafka-docker-playground.yml
09:38:57 ℹ️ 🔐 ec2 pem file used: /Users/vsaboulin/Downloads/xxx.pem
{
    "StackId": "arn:aws:cloudformation:eu-west-3:xxx:stack/kafka-docker-playground-vsaboulin-test/xxxxx-390f-11ef-82f9-xxxx"
}
09:38:59 ℹ️ ⌛ Waiting up to 300 seconds for ec2 instance kafka-docker-playground-vsaboulin-test to be running
09:39:21 ℹ️ ec2 instance kafka-docker-playground-vsaboulin-test is running
{
    "Return": true
}

[vdesabou]

available now: https://kafka-docker-playground.io/#/playground%20ec2

[vdesabou]

• [x] add dotfiles
• [x] make sure aws has correct permissions
• [x] add rsync for reproduction models