add delete service subcommand

[llimllib]

Adds support for deleting a service. Here's an example of it in action:

$ ./bin/render services list
id                       name                type        serviceDetails.env slug                serviceDetails.numInstances
crn-cj5s2dicn0vc73fv4rlh test-service-delete cron_job    image              test-service-delete                            
srv-cisrtch5rnujejodpfq1 metrics-test-stage  web_service image              metrics-test-stage  1                          
srv-cisrtch5rnujejodpfqh metrics-test-prod   web_service image              metrics-test-prod   1                          
srv-chnpupo2qv207f2k374h readme-next         web_service docker             readme-next         1                          

$ ./bin/render services delete --id crn-cj5s2dicn0vc73fv4rlh

$ ./bin/render services list
id                       name               type        serviceDetails.env slug               serviceDetails.numInstances
srv-cisrtch5rnujejodpfq1 metrics-test-stage web_service image              metrics-test-stage 1                          
srv-cisrtch5rnujejodpfqh metrics-test-prod  web_service image              metrics-test-prod  1                          
srv-chnpupo2qv207f2k374h readme-next        web_service docker             readme-next        1

• It doesn't look like any of the other commands are tested, so there are no tests
• I couldn't figure out what formatter you are using so the code may not be formatted according to your project's style
  • I'm happy to fix that if you can help me out

[llimllib]

@robdimarco-render 2 questions:

• Any interest in this PR?
• Is this CLI an ongoing concern? It seems to be abandoned

[robdimarco-render]

Thanks for the submission.

Currently, the CLI is being maintained. However, new development on it has been a lower priority for us.