Upgrade to ESM is currently blocked

[usu]

• Vite CJS build is deprecated https://vitejs.dev/guide/migration.html#deprecate-cjs-node-api
• newest version of react-pdf removes CJS support fix(print): fix broken react print #6036
• Upgrading everything ESM build is blocked by eslint-plugin-local-rules ESM support cletusw/eslint-plugin-local-rules#30

[usu]

eslint-plugin-local rules might not be necessary with introduction of eslint flat config. There seems to be possibilities to load custom rules directly from the config:

https://eslint.org/blog/2022/08/new-config-system-part-2/#from---rulesdir-to-runtime-plugins
https://eslint.org/docs/latest/extend/custom-rule-tutorial