Add new terraform and helmfile commands

[aknysh]

what

• Add new terraform and helmfile commands
• Terraform commands: console, show
• helmfile commands: template, list, status, test, write-values

why

• More native Terraform and helmfile command supported by atmos

references

• https://github.com/roboll/helmfile#cli-reference

test

 √ . example ⨠ atmos terraform console vpc -s ue2-dev
{"cidr_block":"10.100.0.0/18","environment":"ue2","namespace":"eg","region":"us-east-2","stage":"dev","test-map":{"a":"a3","atr":{"atr1":"1-1","atr2":"2-3","atr3":3,"atr4":4,"list":["1b"]},"atr-2":{"atr1":1,"atr2":2},"b":"b2","c":"c1","d":"d3","e":"e3","g":"g1","list":[4,5,6],"list2":[1,2,3]}}
Initializing modules...
Downloading git::https://github.com/cloudposse/terraform-aws-dynamic-subnets.git?ref=tags/0.39.1 for subnets...
- subnets in .terraform/modules/subnets
Downloading cloudposse/label/null 0.24.1 for subnets.nat_instance_label...
- subnets.nat_instance_label in .terraform/modules/subnets.nat_instance_label
Downloading cloudposse/label/null 0.24.1 for subnets.nat_label...
- subnets.nat_label in .terraform/modules/subnets.nat_label
Downloading cloudposse/label/null 0.24.1 for subnets.private_label...
- subnets.private_label in .terraform/modules/subnets.private_label

Initializing the backend...

Terraform has been successfully initialized!

Workspace "ue2-dev" doesn't exist.

You can create this workspace with the "new" subcommand.
Created and switched to workspace "ue2-dev"!

You're now on a new, empty workspace. Workspaces isolate their state,
so if you run "terraform plan" Terraform will not see any existing state
for this configuration.
> 1 + 1
2
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[Nuru]

terraform console should be interactive by default

comments addressed