VSCode configurations: poetry env, disable julia language server, increase max-line-width

Thanks for this nice initiative! [Here](https://gist.github.com/blenzi/5fff71a220b77e2fe63874e191cdf938) is the script I wrote few months ago, hoping it is still valid. It allows to add poetry environnements to the list of python envs (to be run after the installations), disable julia language server, increase max-line-width and maybe others. Hope it is useful.

Review the linked Gist and the repository's initialization scripts to understand how VSCode settings are currently installed. Check whether the proposed Poetry environments, Julia language-server setting, and max-line-width setting fit the existing installation flow, then verify each setting after initialization.

Rédigé par le modèle d'indexation à partir du texte de l'issue.