Upgrade to ESLint 9.x

[oliverroick]

Resolves #31

• Upgrade dependencies latest versions:
  • ESlint to 9.14.0
  • eslint-plugin-prettier to 5.2.1
  • eslint-plugin-react to ^7.37.2
  • eslint-plugin-unused-imports to 4.1.4
• Pin globals package to ^14.0.0, which is required to run ESLint 9.x successfully
• Add new ESlint config (eslint.config.mjs) compatible with ESLint 9.x
• Remove previous ESLint config (.eslintrc.js)
• Remove ESLint from pre-commit
• Add ESLint Gtihub action
• Regenerate package-lock to remove some references to a private registry

[yuvipanda]

The pre-commit failure is why we couldn't do this last time either I think

[yuvipanda]

Is it possible to get autofix with this setup too?

[oliverroick]

The auto fix is still running via prettier on pre-commit. The change here only affects the lint check.