Feature Req: Apply Canonical formatting

[maroskukan]

First of all, thanks for this plugin, it is awesome. I was wondering whether you could add a feature plugin command that could apply canonical file formatting.

Therefore taking for example:

data "amazon-ami" "amazon-linux-2" {
    filters = {
        name = "amzn2-ami-hvm-2.*-x86_64-gp2"
        root-device-type = "ebs"
        virtualization-type = "hvm"
    }
    most_recent = true
    owners = ["amazon"]
    region = var.aws_region
}

And run packer fmt file.pkr.hcl resulting in:

data "amazon-ami" "amazon-linux-2" {
  filters = {
    name                = "amzn2-ami-hvm-2.*-x86_64-gp2"
    root-device-type    = "ebs"
    virtualization-type = "hvm"
  }
  most_recent = true
  owners      = ["amazon"]
  region      = var.aws_region
}

I tried to use runonsave extension but I have automatic saving of file every few seconds and when I am in the middle of writing a template it causes issues. It would be more convenient to pen a command pallet and execute this action through your plugin.
Thanks.