`init` CLI command

[harrysolovay]

What might it look like to create an interactive init command for generating an initial genie config?

Let's explore a common example: configuring formatters.

This step might involve...

1. Selecting your desired formatter(s) (Prettier, Biome, Dprint, SQLFormat, misc.).
2. Deciding to which file extensions you want to apply the given formatter(s).
3. Using that selection when generating related configs (for instance, .vscode/settings.json could reflect format-on-save preferences for the selected file types).