Auto-initialize a Git project when creating projects

[IlCallo]

Previous work on the topic, when we still had many separated starter kits:

• feat(cli): git auto initialization on creation #8800
• feat: add git repo auto initialization quasar-starter-kit#148
• feat: add git repo auto initialization quasar-starter-kit#149

We can offer a CLI argument such as --no-git to explicitly disable this behavior.
We can perform an up search to detect if the user is creating the project inside an existing git repository, e.g. in a monorepo, then automatically skip initializing the Git project. If they still need to set it up in such as scenario, which would be quite rare I presume, they could just do it manually.