feat(cli): Add 'all' option for fields argument

[kevinkengne]

Fixes #876

Addall for the --fields argument, which causes the output to contain all the supported fileds: price, monthlyQuantity, unit, hourlyCost, monthlyCost.

CLI command executed

make run ARGS="breakdown --path examples/terraform --usage-file=examples/terraform/infracost-usage.yml --fields=all: 

Output returned

 Name                                                           Price  Monthly Qty  Unit         Hourly Cost  Monthly Cost 
                                                                                                                           
 aws_instance.web_app                                                                                                      
 ├─ Instance usage (Linux/UNIX, on-demand, m5.4xlarge)          $0.77          730  hours              $0.77       $560.64 
 ├─ root_block_device                                                                                                      
 │  └─ Storage (general purpose SSD, gp2)                       $0.10           50  GB                 $0.01         $5.00 
 └─ ebs_block_device[0]                                                                                                    
    ├─ Storage (provisioned IOPS SSD, io1)                      $0.13        1,000  GB                 $0.17       $125.00 
    └─ Provisioned IOPS                                        $0.065          800  IOPS               $0.07        $52.00 
                                                                                                                           
 aws_lambda_function.hello_world                                                                                           
 ├─ Requests                                                    $0.20          100  1M requests        $0.03        $20.00 
 └─ Duration                                            $0.0000166667   25,000,000  GB-seconds         $0.57       $416.67 
                                                                                                                           
 OVERALL TOTAL                                                                                                   $1,179.31

[tim775]

Nice job, thank you!