add info about not overwriting .git folder?

[PierBover]

When a creating a project on an empty repo it's not clear whether the CLI will overwrite all the contents in the folder (including the .git folder).

@danielroe can I make a PR to replace the menu option from Override its contents to Override its contents (not including .git folder)?

I'm referring to these options:

cli/packages/nuxi/src/commands/init.ts

Line 128 in 4482e9d

options: ['Override its contents', 'Select different directory', 'Abort'],