v6 - Eslint9 flatconfig

[ribeiroguilherme]

Summary

• Adding support for Eslint flat config
• Eslint now uses the tsconfig.eslint.json in order to analyze our code based on our typescript configuration (before it was disabled - that is why I had to fix many files)
• jsx-a11y rules are now fully enforced

Side notes:

• I fixed couple of eslint issues; others I simply disabled because I didn't want to touch the logic. We can iterate on the disabled ones later to properly enforce the eslint rule
• The linter is disabled when running dev mode (on Storybook and old playground) since @rollup/plugin-eslint does not support the eslint9 yet, but the Linter does run before the building process and with your IDE