[Task] Allow Prettier and ESLint to cover everything

[kmcginnes]

Description

Allow Prettier and ESLint to check as much code as possible.

Additional Context

We are currently ignoring:

• All Markdown files
• All files in the documentation folder
• The entire proxy server folder
• The /.github/ folder

Related Issues

Originally part of #303.

Tasks

• [ ] Let Prettier update format of server code and config files
• [ ] Fix ESLint errors in server
• [ ] Fix tsconfig issue

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[kmcginnes]

Probably best to tackle this in two PRs.

1. Prettier formatting where no logic should change
2. ESLint fixes, where logic may need to change and review should be more careful