Making `biome help` follow a better format

Unix tools typically have a nice help screen. Biome's is lacking. I'm looking for some help making Biome's help page (`biome help`) a lot more informative and easy to scan.

The two workflows that are most common with Biome:
- Running `biome init` to create a new environment, then `biome use` to start using that environment inside of a new project (similar to `npm init`)
- Running `biome` to set up a freshly-cloned project (similar to an `npm install`)

Willing to work on this? Here's what you'll ideally do:
- Within the source of Biome, run: `./biome.sh help`
- Improve the help text inside of the bash script (look for `help)` in the large case statement)
- I've totally neglected to talk about Biome's ability to specify an optional environment name for any command. For example, `biome use` can take another arg and become `biome use myfancyenvironment` (that command would now apply to `myfancyenvironment` and not the environment specified in the Biomefile). This should be documented somewhere.
- Make the above workflows blatantly obvious.

Thanks!

Le texte d’aide se trouve dans la grande instruction case à l’intérieur du script bash (probablement biome.sh). Exécute `./biome.sh help` pour voir la sortie actuelle. Cherche le cas `help)` pour modifier le texte d’aide. Documente l’argument optionnel du nom d’environnement pour des commandes comme `biome use`. Rends clairs les deux workflows courants (init/use et la configuration d’un projet cloné) dans la sortie d’aide. Teste en exécutant à nouveau le script pour vérifier les changements.

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