Marshallhhhh/feature/create backend lint and format workflows

[marshallhhhh]

Summary

This PR introduces code formatting and linting improvements across the app backend to enforce consistent code quality and style.

Changes

• Added Prettier and ESLint workflows that run automatically on pull requests targeting main
• Updated ESLint to the latest version
• Refined and updated ESLint and Prettier configuration files
• Added Prettier npm scripts to package.json for easier local formatting

Details

CI Workflows

• New workflows ensure that all PRs into main are automatically checked for:

  • Linting errors
  • Formatting issues

• This helps catch issues early and maintain consistency across contributions

ESLint Updates

• Upgraded ESLint to v9
• Updated rules/config

Prettier Updates

• Added scripts to package.json:

  • format – formats the backend using Prettier
  • format:check – checks for formatting issues without modifying files