New Rule: template-render-format

[jleja]

• Adds template-render-format as the first MT custom linting rule
• Ensures proper formatting for rendering components in tests:
  • Single property components
  • Single property components wrapped in body tags
  • Single property component block templates
  • Single property component block templates wrapped in body tags
  • Multiple property components
  • Multiple property components wrapped in body tags
  • Multiple property component block templates
  • Multiple property component block templates wrapped in body tags
• Adds some common repo files, such as yarn lock, editor config, and Circle CI
• Adds linting rules based on those from other Mariana projects, removing any plugins/globals that were Ember-project specific

[RobbieTheWagner]

Looks good! Appreciate the work you put into this 👍 . If you wanted to implement another rule, while you're at it, I've been following this one eslint/eslint#5949

[jleja]

@rwwagner90 Maybe not in this PR, but certainly something to look into after sprint commitments are taken care of. :)