feat: upgrade to eslint v9

[Zyie]

This PR updates the config to eslint v9 which uses the new flat config

For the most part all the rules are the same, most of the changes are around many rules moving to the new @stylistic repo
I did also move over some rules from the main pixi repo:

{
  'operator-assignment': [1, 'always'],
  camelcase: [1, { allow: ['^v\\d{1,}_\\d{1,}_\\d{1,}$'] }],
  'no-void': ['error', { allowAsStatement: true }],
  '@typescript-eslint/no-unused-expressions': [1, { allowShortCircuit: true, allowTernary: true }]
}