Can we discard some packages?

## Description

Recent changes have been happening on packages (jest-vitest, ESlint-Oxlint,...) as well as clean-ups.

We should assess in if more packages can be discarded.

## Acceptance criteria

1. Assess in if more packages can be discarded

Start by reviewing the repository's package configuration and the recent cleanup changes involving jest-vitest and ESlint-Oxlint. Inventory packages that may be removable and verify whether the project still depends on them; done means the assessment identifies concrete packages that can be discarded and any required follow-up.

Written by the indexing model from the issue text.