The Great Prettier Linting

[StephenHulme]

When Prettier was updated to version 3, a config was required to specify an plugins, such as https://github.com/prettier/plugin-ruby, that were used. This PR retrospectively adds this change, along with the subsequent linting.

Changes proposed in this pull request

• Specify plugin-ruby in prettier config file
• Add Ruby dependencies for plugin-ruby
• Lint codebase

In some cases Prettier and Rubocop were fighting over who's formatting rules would win. I tried to defer to Rubocop by telling Prettier (STree) to ignore those lines, but in some cases the ignores failed, so I told Rubocop to ignore them instead. I think it is more important that linting is reenabled soon, than the style be completely consistent.

Related

See #4089 for the Rubocop equivalent of this PR.

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