feat(iam): adding interactive management of users to the tool

[clok]

BREAKING CHANGE:
The command gw-aws-audit iam user-report has been renamed to gw-aws-audit iam report

This adds User reporting and interaction to the toolset via the iam command set.

$ gw-aws-audit iam
NAME:
   gw-aws-audit iam - IAM related commands

USAGE:
   gw-aws-audit iam command [command options] [arguments...]

COMMANDS:
   report          generates report of IAM Users and Access Key Usage
   modify          modify an IAM User within AWS
   permissions, p  view permissions that are associated with an IAM User
   keys            view Access Keys associated with an IAM User
   help, h         Shows a list of commands or help for one command

OPTIONS:
   --help, -h  show help (default: false)

• report replaces the deprecated user-report

  $ bin/gw-aws-audit iam user-report
  deprecated: please user the `iam report` command
  $ bin/gw-aws-audit iam user-report -h
  NAME:
     gw-aws-audit iam user-report - DEPRECATED: Please use the `iam report` command
  
  USAGE:
     DEPRECATED: Please use the `iam report` command
  
  OPTIONS:
     --help, -h  show help (default: false)
  

• modify opens an interactive CLI that allows you to modify Permissions and Access Keys for a User
• permissions specifically interacts with Permissions for a User
• keys specifically interacts with Access Keys for a User