Setup vue-cli

Ref. #1023 (closed)

Based on those experiments : https://notes.teklia.com/UIypMJTcTayjO6CVo1sxvw?view

As a first step, we tried to migrate the project to vue-cli with @erwanrouchet.
A later update to Vue3/Vite seems reasonable.

We planned to update each part step by step, running tests via vue-cli-service:

• Imports
• Tests
• Store
• Router

TODO:

• 2 tests are actually skipped (one is #1040 (closed))
• Component names should be multi-word to avoid HTML keywords conflicts (https://eslint.vuejs.org/rules/multi-word-component-names.html) → #1043
• Clean pre-commit setup (duplicated as handled by vue-cli)
• Move routes components to src/views/ → #1042 (closed)
• Check the docker build
• Test Vue3 bump (https://v3-migration.vuejs.org/migration-build.html#upgrade-workflow) → !1312 (merged)
• Customize the Webpack config in vue.config.js to match what we had before in webpack.config.js (LicenseWebpackPlugin in prod among others)