AO3-7196 Show supended/banned status upon login

[ej-sanmartin]

Pull Request Checklist

• Have you read "How to write the perfect pull request"?
• Have you read the contributing guidelines?
• Have you added tests for any changed functionality?
• Have you added the Jira issue number
  as the first thing in your pull request title (e.g. AO3-1234 Fix thing)
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  until they are reviewed and merged before creating new pull requests.

Issue

https://otwarchive.atlassian.net/browse/AO3-7196

Purpose

What does this PR do?

Add suspended/banned status upon login.

Testing Instructions

Went through test instruction through Jira, added .feature tests

Credit

Edgar San Martin, Jr. (Jira issue already claimed by myself).

[ej-sanmartin]

rubocop was also throwing multiple errors due in sessions_controller.rb and application_controller.rb so cleaned those up, as well.

[Bilka2]

rubocop was also throwing multiple errors due in sessions_controller.rb and application_controller.rb so cleaned those up, as well.

If you touch a lot of unrelated parts of the files like you did here it makes reviewing a lot harder and merge conflicts much more likely. As is, a lot of the fixes also aren't desired code style, e.g. we'd want to use redirecting to root_path over /, i18n the errors and more. Fixing all that would add a lot of extra back and forth to what could be a more simple change here. So please revert the extra corrections and focus them only on the lines you added/changed, thank you!