ESlint 9 Migration

[Morphclue]

Context

The goal is to migrate to the current active ESlint 9 version.
The main changes which introduced the breaking change is the new eslint.config.js-file. We can migrate there manually with the following command according to eslint docs (ofc use pnpm).

npx @eslint/migrate-config .eslintrc.json

OR better use the integrated nx command

nx g @nx/eslint:convert-to-flat-config

Known issue for unsupported.mjs: nrwl/nx#22576